1)the theme ohf the movie is pay it foward.the message is that one person helps three people and the person that got helped has to pay it fowerd and so on.

2)i would say trevor because he took his life for another little kid that was getting beat up by three kids.

3)the characters would be mr.simmonet,trevors brother,trevors sister,trevors cousin,trevors aunt&uncle,and that kid that stabed trevor and his friends.the way they would pay it foward is that they should do some thing biger...