You write why you think s/he has violated the court order. You might want to explain why you’ve let this go on for a decade.

Yes. You have to register your vehicles and pay fees, whether you are a citizen or not.

Yes. If you don’t fix the problems that caused the previous terminations, plan on any future children being removed from you.

Once the protective order expires, everything about it expires. If that’s your only custody order, you no longer have a custody order.

If the state gets involved, the kids will be placed with other family members or foster care.

That’s not a basis to modify child support arrears. Your support payments are either reimbursing the state or are going to the mother’s heirs.

It’s unlikely that the police will go looking for her. She might serve time in jail.

Your attorney knows your situation better than any of us. Listen to him/her.

Based on your description, mom is sharing custody with paternal grandma.

He needs to hire an attorney immediately.