Possess Pawn and select characters

Hey guys,
I have been looking everywhere for days, but there do not seem to be any tutorials that suit my desired function. What I want to do is seemingly basic, however, my limited skillset and knowledge hinders my ability to perform these tasks. I have approached this problem at pretty much every angle, so if someone could graciously shed some light, that would be more than appreciated.
Basically, all I want to do is make a character selection screen in which the widget displays the pawns able to be controlled, and subtracts money from your count upon clicking (paying) for the character (tank). However, I am struggling with adding possession to my pawn, and differentiating each pawn (tank) so that each is different in function. If you have any further specific questions I would be happy to elaborate.