No too young, wait till you grow up. Enjoy your precious young life while you can.
18
No, to adopt a child you have to be at least 18 years old.
No.
No you can not.
At least 21.
what size of what??
6'4"
Yes.
around the 20's to 30's
if he did not adopt the child, no. Check your country or state's laws about this matter.
You can't adopt an adult. And his child is not an orphan, so you can't adopt him either. You can marry the man and then adopt his son.
Legally you can not force your child to give up the custody. They are the guardian of their child and not you, no matter how old they are.