Answer:
I am a band that does not perform sing or act.
I have no voice but I can teach you all there is to know. I have spines and hinges but I am not a door. Once I’ve told you all I cannot tell you more.
I am free the first time and the second time, but the third time is going to cost you money. What am I?
I am lighter than the material I am made of. You see parts of me but more of me is hidden underneath.
You can see me in water, but I never get wet. What am I?
The answer I give is yes, but what I mean is no. What was the question?