Doctrine does save and here is the verses to prove it:
1Ti 4:16 Take heed unto thyself, and unto the doctrine; continue in them: for in doing this thou shalt both save thyself, and them that hear thee.
Rom 6:17 But God be thanked, that ye were the servants of sin, but ye have obeyed from the heart that form of doctrine which was delivered you.
Rom 6:18 Being then made free from sin, ye became the servants of righteousness.
2Jn 1:9 Whosoever transgresseth, and abideth not in the doctrine of Christ, hath not God. He that abideth in the doctrine of Christ, he hath both the Father and the Son.
2Jn 1:10 If there come any unto you, and bring not this doctrine, receive him not into your house, neither bid him Godspeed:
Act 2:42 And they continued steadfastly in the apostles' doctrine and fellowship, and in breaking of bread, and in prayers.
Does false doctrine send a person to hell? I believe yes:
Gal 1:9 As we said before, so say I now again, if any man preach any other gospel unto you than that ye have received, let him be accursed.