No
Yes they can.
Depends on who made the change. If the parents are not married to each other the decision what last name the child will have belongs to the mother and she will not need the consent of the father.
NO
If you are 16 you can, with a parent's consent, but you have to be 18 without parent's consent.
If she is a minor (under the age of consent) then yes.
No. The age of consent in SC is 16.
No you do not need consent if you are the legal parent.
For what?
no, the parent that let the boyfriend move in can face child endangerment charges
If the parents are married, yes. If one parent has sole custody that parent can consent.
18 Without parent consent. With parent consent I believe you can have it done at 16.
you can be 13+ to get a facial piercing if you have a parent consent if you do not have a parent consent then you have to be 18 years old