How to make a running Animation in Run game.

Hi, I am a new user in Gaming. So i have a silly doubt in my mind. I created Character animation in Maya, exported into unity. I did my background is still, character should go forward. So here my doubt is, 1)How to give continuity animation? 2)Either i have to create stationary walk cycle or progressive walk cycle? 3)If i create both type of animation, how many frames i have to do post infinity? 4)Is any other method is available for running animation? I am looking answer for these questions. If you know any answer, really help full for me. Tutorial&Video tutorial, is best. Advance thanks.