How to know the name of different elements in a asset and how to change their textures?

Sorry if my question does not make sense, I am a newbie
So I have a car asset that im using in my level.
My car has different elements, how do I know? well, when i click on the it and go to materials it shows that is has element0 to element 50.

  1. is there a way that I just move the cursor over the asset and it shows me the name of each element?
  2. is there a way that I can change the the materials for a group of elements together in my car asset?