How old are stars?
The age of an individual star can vary; they were all made at different times and have different life spans. Stars can range from a few million to a several billion years old. The oldest star yet discovered, HE 1523-0901, is an estimated 13.2 billion years old.
The fate of an old star depends on its mass. Small stars will burn, essentially, forever. Medium mass stars like our Sun will eventually expand into a red giant, and collapse into a white dwarf. Very large stars will explode as supernova stars; these end up as neutron stars or if their initial mass is large enough, as black holes.