I need help for my first model

It took me 4 hours of work, but it was worth it.
The problem:
I know myself only with the weapon view models.

http://imageshack.us/photo/my-images/23/screenshotxho.png/

I want my model for example uses the custom animations
walk, run, jump …
Is this possible or will only the given animation
anything else in this Molotov http://claagnut.files.wordpress.com/2009/05/left4dead-2009-05-01-22-33-44-001.png of Left 4 Dead
you see a paper that the sealed closure. This paper is Physically it is possible to make a homemade model

what are you even asking im confused here