I have downloaded from asset store a 3d model that comes with some animations. At the instructions they gave was to create an animator controller and the animation could be used. I'm beginner using unity and just create and put de animations in animator controller don't make useful, I can't control time, distance of an avatar walks... somebody can help me?
There are several things you need to learn before you can animate your character.
Unity had conveniently created a comprehensive tutorial on this subject, so beginners such as yourself could learn how to use the program. The link is below: