How do I make my manikin go from one point to another fire a gun and record the event in sequence.

I know this is a loaded question. But i just watched like 20+ YouTube tutorials on sequences, animating, and AI but none of them have helped. What I’m trying to do is create a simple scene to add to a movie project I am working on, I thought this would be easier than cinema 4D but apparently not. So, here is what i’m trying to accomplish. First I need my character to start at one point walk toward the front a building, run through the doors and the begining of it, slow down then stop and fire a simple pistol. Next I want to record this whole thing to make a sequence out of it. Finally I have the building done and the camera sequence is all set up all i need now is this last step which appears to be the hardest thing in the world to do lol. Can anyone help in anyway?