My answer to question 2;
What is the purpose of having the stars?
The word purpose in the question indicates that stars are there for our benifit, that they serve a function purely for us, mankind. I will leave that debate for the theologians and philosophers. But the stars do serve a very practical purpose in the ways of mankind. With out the stars life wouldn't exist.
Stars are born and like anything else that is born they will die. Stars die in a number of ways usually in violent explosions or gently puffing off celestrial smoke rings. In either case the stars seed the cosmos with the very ingredients that make life possible. Carbon, Oxygen, Iron these elements and many more ensure life is possible and is the reason why we are here to ask questions about the universe.
Boy I'm in ta zone tonight