You could go to jail. Go to probation and don't lie. Make sure it does not happen again.

You need to file for custody and get something worked out before you let him go. With no court orders she will be able to keep him .

Send her a certified letter that you want her to withdraw or. Retain a new lawyer and they will file a Motion to Substitute

It usually means no probable cause but you need to ask your lawyer or call the court and see if the case is still open

I appears they were given probation .

If you are 17 it is the age of consent and he can't get in trouble.

No. that is not a defense. You need a lawyer asap.

If you receive rent on monthly basis give them a 30 day notice to vacate

Yes . And notify the insurance or account that the beneficiary was changed asap.

Based on the facts you stated I don't think it is worth appealing.