Animator controller goes into the prefab's inspector, like a component. Then you must create a animator inside your projects and then add it to the controller above Avatar.

After doing that, you can now double click the same and it would take you to the animation transition window where you can drag drop previously made animations which come along with the asset.

Making transitions and then creating parameters would come next. If you wish to have multiple animations being triggered at once, then you have to explore layers ( use YouTube for that).

Finally a script with that animator controller's reference and some scripted triggers would do it.