W/e the legal age is in the state he is living in.
no she can not
No.
The parents can give them consent to move out. Without it they will have to be an adult.
No.
no
In most states you have to be 18 to move out without parental permission.
No he cannot.
no he needs to be 18 to take any such kind of decisions
yes
When they are old enough to move by themselves, and when they no longer drink milk from there mother.
No. The 16 year old is a minor while the 20 year old is an adult. The adult can be charged with rape of a minor.
nothing.