When they ask "What shall I do to be saved?":

Acts 16:28-31
28 But Paul cried out with a loud voice, saying, "Do yourself no harm, for we are all here!" 29 And he called for lights and rushed in and, trembling with fear, he fell down before Paul and Silas, 30 and after he brought them out, he said, "Sirs, what must I do to be saved?" 31 And they said, "Believe in the Lord Jesus, and you shall be saved, you and your household."

Matthew 24:13
"But the one who endures to the end, he shall be saved.

When they ask "What shall I/we do?":

Luke 3:10-14
10 And the multitudes were questioning him, saying, "Then what shall we do?" 11 And he would answer and say to them, "Let the man who has two tunics share with him who has none; and let him who has food do likewise." 12 And some tax-gatherers also came to be baptized, and they said to him, "Teacher, what shall we do?" 13 And he said to them, "Collect no more than what you have been ordered to." 14 And some soldiers were questioning him, saying, "And what about us, what shall we do?" And he said to them, "Do not take money from anyone by force, or accuse anyone falsely, and be content with your wages."

John 6:28-29
28 They said therefore to Him, "What shall we do, that we may work the works of God?" 29 Jesus answered and said to them, "This is the work of God, that you believe in Him whom He has sent."

Acts 2:37-38
37 Now when they heard this they were pierced to the heart, and said to Peter and the rest of the apostles, "Brethren, what shall we do?" 38 And Peter said to them, "Repent, and let each of you be baptized in the name of Jesus Christ for the forgiveness of your sins; and you shall receive the gift of the Holy Spirit.

Mark 10:17-23
17 And as He was setting out on a journey, a man ran up to Him and knelt before Him, and began asking Him, "Good Teacher, what shall I do to inherit eternal life?" 18 And Jesus said to him, "Why do you call Me good? No one is good except God alone. 19 "You know the commandments, 'Do not murder, do not commit adultery, do not steal, do not bear false witness, do not defraud, honor your father and mother.'" 20 And he said to Him, "Teacher, I have kept all these things from my youth up." 21 And looking at him, Jesus felt a love for him, and said to him, "One thing you lack: go and sell all you possess, and give to the poor, and you shall have treasure in heaven; and come, follow me." 22 But at these words his face fell, and he went away grieved, for he was one who owned much property. 23 And Jesus, looking around, said to His disciples, "How hard it will be for those who are wealthy to enter the kingdom of God!"

Luke 10:25-28
25 And behold, a certain lawyer stood up and put Him to the test, saying, "Teacher, what shall I do to inherit eternal life?" 26 And He said to him, "What is written in the Law? How does it read to you?" 27 And he answered and said, "You shall love the Lord your God with all your heart, and with all your soul, and with all your strength, and with all your mind; and your neighbor as yourself." 28 And He said to him, "You have answered correctly; do this, and you will live."

Luke 18:18-27
18 And a certain ruler questioned Him, saying, "Good Teacher, what shall I do to inherit eternal life?" 19 And Jesus said to him, "Why do you call Me good? No one is good except God alone. 20 "You know the commandments, 'Do not commit adultery, do not murder, do not steal, do not bear false witness, honor your father and mother.'" 21 And he said, "All these things I have kept from my youth." 22 And when Jesus heard this, He said to him, "One thing you still lack; sell all that you possess, and distribute it to the poor, and you shall have treasure in heaven; and come, follow me." 23 But when he had heard these things, he became very sad; for he was extremely rich. 24 And Jesus looked at him and said, "How hard it is for those who are wealthy to enter the kingdom of God! 25 "For it is easier for a camel to go through the eye of a needle, than for a rich man to enter the kingdom of God." 26 And they who heard it said, "Then who can be saved?" 27 But He said, "The things impossible with men are possible with God."

Mark 10:26-32
26 And they were even more astonished and said to Him, "Then who can be saved?" 27 Looking upon them, Jesus said, "With men it is impossible, but not with God; for all things are possible with God." 28 Peter began to say to Him, "Behold, we have left everything and followed You." 29 Jesus said, "Truly I say to you, there is no one who has left house or brothers or sisters or mother or father or children or farms, for My sake and for the gospel's sake, 30 but that he shall receive a hundred times as much now in the present age, houses and brothers and sisters and mothers and children and farms, along with persecutions; and in the age to come, eternal life. 31 "But many who are first, will be last; and the last, first." 32 And they were on the road, going up to Jerusalem, and Jesus was walking on ahead of them; and they were amazed, and those who followed were fearful. And again He took the twelve aside and began to tell them what was going to happen

John 3:17-18
17 "For God did not send the Son into the world to judge the world, but that the world should be saved through Him. 18 "He who believes in Him is not judged; he who does not believe has been judged already, because he has not believed in the name of the only begotten Son of God.

Acts 2:21
'And it shall be, that everyone who calls on the name of the Lord shall be saved.'

Romans 10:8-11
8 But what does it say? "The word is near you, in your mouth and in your heart"-- that is, the word of faith which we are preaching, 9 that if you confess with your mouth Jesus as Lord, and believe in your heart that God raised Him from the dead, you shall be saved; 10 for with the heart man believes, resulting in righteousness, and with the mouth he confesses, resulting in salvation. 11 For the Scripture says, "Whoever believes in Him will not be disappointed."