see links below
If you are going to live in another state, then you need a court agreement. If you are just visiting, then you need custody papers and other legal documents. If the father is dead, then it's agood idea to bring his death certificate too.
Parents decide where the child will live and if they are moving they have to come with.
Live your life
If the parents are divorced then it is between the parents if the child can go live with the other parent. At age 14 the child can choose witch parent he/she wont's to live with. If that other parent is not willing to let the child go live with that parent then it can be taken to court or just wait till the child is 18 and can go live on it's own.
In Indiana and in other US states, child custody laws are complicated. Despite a minor's choice as to which parent they wish to live with, it can be a delicate situation. Normally a state child care agency will have its own recommendation. To make any change and be sure, a court will take into account many factors and reach a decision.
when him and the child bond and get to know each other
no see links below
Yes. A child as young as 11 years old can choose which parent they wish to live with. It doesn't mean however that a judge will grant it, it merely means that the child can file formally with the court for a change in custody.
When they are 18.
Yes.
No, but see the related question.
you have to be thirteen and over.