Help with a few things in TGB.

I am making a 2d game in TGB for a class at school. i need to know if i can set each character animations in their class (make a Mario class and set the then animations for atting walking and jumping etc.) then inherit it into a behavior so I have the ?
Second how do you make select screen?
third how do i switch levels after one person has beaten another?
Finally how do you differentiate between two controllers hooked into the same computer?