The change in Homer's voice is tied to how Homer's role in The Simpsons changed.
Initially, Homer was not the main character to the extent that he ended up becoming in later seasons. That's not to say that there weren't Homer-centric episodes, but Homer was a more reasonable character back then. Still an oaf, but more of a Joe Average and not really the ...
We don't know.
No official sources have talked about this, and with a movie this old, I doubt they ever will. Multiple theories exist around the web.
This would be because Finger was voiced by none other than Vin Diesel.
Diesel went uncredited for this small role. Though Besson has stated that he does not want to make a sequel, I ...