In most cases it is not necessary. They are considered an adult at age 18.
yes but only if the 16 year old was emancipated.
NO
Yes, an emancipated minor is, for all legal purposes, an adult and can thereby do whatever they want within the boundaries of the law. It would be perfectly legal for you to move in wherever you wanted.
yes
No, an 18 year old is an adult.
not unless your emancipated.
yes
No.
if you are 19 there is no need to be emancipated you are already a legal adult
After 18 you can get emancipated in Puerto Rico.
Yes, if she is emancipated.
Yes, if you are a gamer. Not so much for educational purposes though.