Controls an camera

Im a new to blender.

How do i make controls to a man? So when i press up he goes up?
And how to make the camera to follow a person.
Its to a ragdoll game.

Sorry my bad english:(

Welcome to the forum…

here is exactly what you are looking for:
http://wiki.blender.org/index.php/BSoD/Introduction_to_the_Game_Engine

just not the rag doll part… look up rigid body constraints to learn that.