There is not a verse in the Bible that teaches that God places the believer in a position to be saved provided he does other things. No. No. The Bible says He saves the believer.
If turning from your sins means to stop sinning, then people can only be saved if they stop sinning. And it is unlikely that anyone has ever been saved, since we don't know anyone who has ever stopped sinning.
There is not a verse in the Bible that teaches that God places the believer in a position to be saved provided he does other things. No. No. The Bible says He saves the believer.