No, only the judge presiding over the custodial hearing can do that.
What rights are you talking about? Are they parents? To give the 19yo custody or terminate the 15yo parental rights you have to go to court to do so. The 19yo have to petition for custody.
If your parental rights were terminated and your child was legally adopted your chances are slim that any court will reverse that order. Think of your child. If the child was adopted and has adapted to a new family it would be extremely disruptive to remove the child from that home. There must have been extreme circumstances for the court to terminate your parental rights in the first place. Your problems and instability should not continue to affect the child. You should consult with an attorney who can review your situation and explain your options, if any, or your lack of rights to be involved in your child's life.
If the father gives up his rights they will have no rights either. They can see the child if the mother say so. Even before that only a few states have rights for grandparents so they can seek visitation through the court. It is always up to the parents to decide.
You have the same parental rights as an adult when the baby is born. During the pregnancy and after you are the one deciding over your health.
Have you alerted the court that he is not paying so they can take it out of his paycheck? If there has been absolutely NO contact for 2 years you can petition for terminating his parental rights. If the reason he has not paid is because he can't due to no job etc that is not a reason to terminate his rights.
Yes. You have to have parental consent to be legally emancipated, unless you are being mentally/emotionally abused, physically abused, or their living arrangements are unstable.
Yes
Not even if he did have parental rights. Children can have an opinion, but not a right to choose. see link below
His rights are to pay child support and petition for visitation.
There is no hard and fast rule. The Court must determine that it is in the best interest of the child that parental rights be terminated. Contact with the child is considered, but many other issues are also considered.
Not unless you were married (parental approval), or by court order.
No. A person cannot lose their parental rights to a child unless they file a voluntary relinquishment of parental rights petition and it is accepted by the court or the court permanently terminates parental rights due to abuse, neglect or some other applicable issue.