If the minor's custody was awarded by court order, probably not, unless one parent or the other petitions the court for a change of custody.
He should be 14 or 15 years.
No, see link
No, minors are not allowed to choose.
At that age, they can choose whom to live with. In my state it is age 15 that they can choose.
Florida don't allow minors to decide which parent to live with.
No, they can only express an opinion. see link
See related question, but you do not want to complain to family services, as the child will simply be put into foster care, than returned to the custodial parent. In less than 15% of the cases do they give the child to the other parent. The other parent will need to collect evidence and file a custody challenge. The child has the right to an opinion, but not to choose.
You can't actually choose until you are old enough to live alone. You can usually tell the court which parent you want to live with, and if the court agrees they can direct a change.
No, only if they allow her to.
Yes
No, a 15 year old can't live alone on their own because they are a minor and need parental supervision. A 15 year old can be left alone to babysit or on their own for the evening if their parents go out for the evening.
No. Until you are 18 your parents decide.