Where does scripture state we surrender our wills?
Jesus was actually making a statement about our inability.... which leads us to His work not our work.
No - I think he was clearly talking about the need of the assent of one's will in order to get saved:
Mark 8:34-37
34 And when he had called the people unto him with his disciples also, he said unto them, Whosoever will come after me, let him deny himself, and take up his cross, and follow me.
35 For whosoever will save his life shall lose it; but whosoever shall lose his life for my sake and the gospel's, the same shall save it.
36 For what shall it profit a man, if he shall gain the whole world, and lose his own soul?
37 Or what shall a man give in exchange for his soul?
KJV
To lose one's soul - means to end up in hell.
Matt 10:28
28 And fear not them which kill the body, but are not able to kill the soul: but rather fear him which is able to destroy both soul and body in hell.
KJV
The rich young ruler wasn't willing to make a willful choice to accept salvation, if it meant giving away all of his wealth to the poor. That shows he loved his riches more than his wish to go to heaven.
Matt 19:21-24
21 Jesus said unto him, If thou wilt be perfect, go and sell that thou hast, and give to the poor, and thou shalt have treasure in heaven: and come and follow me.
22 But when the young man heard that saying, he went away sorrowful: for he had great possessions.
23 Then said Jesus unto his disciples, Verily I say unto you, That a rich man shall hardly enter into the kingdom of heaven.
24 And again I say unto you, It is easier for a camel to go through the eye of a needle, than for a rich man to enter into the kingdom of God.
KJV