Prelude - Probably Liberi Fatali

Main FF Theme - The crystal thing, right? I'll probably get shot for saying this, but probably FFX's little woo party version xD

Battle Theme - FFVIII or FFVII

Fanfare - FFVII

Game Over - FFX-2

Boss Battle - FFXII definitely (the one that's actually titled Boss Battle). It almost sounds like it could have been a Final Battle theme for a previous FF. FFVIII's is pretty cool, too.

Chocobo - FFVII :3