who turned daved in2 a blood suckin vamp ?

Vlad the Impaler, go on the enlaces section. tu will find the lost boys: the beginning script, it tells u everything :D

No one.

Max maybe

Max wasnt it?

I think it was Max. He was head vampire after all. Plus, in seriously like, every Fanfiction I've read it's Max as well. So yeah, I think it's Max.

On the commentary of the DVD.
Joel Schumacher dicho "Max wanted Lucy is because she's such a good mother and he needed a mother for the lost boys since he's the father."