No. Only the expression (picture, sound/film recording, etc) of a character can be copyrighted . The character itself may be (& usually is) protected by trademark.
You don't. Characters cannot be copyrighted they must be protected by trademark As a practical example If I draw a picture of Superman... my individual drawing is protected by copyright even though...
yes and no. yes because when something is made it is copyrighted. no because as long as you don't take credit for it and make sure that the artist who made also get credit. so you are safe as long as...