What would happen if I were to turn my self in for a warrent over traffic tickets?

Hire legal counsel and allow them to negotiate terms to assist you.

Is it possible to terminate a mortgage contract for total and material breach of contract?

I encourage you to review the contract at length with an attorney to see if your assumptions are correct.

Can family get back money mentally disabled family member donated

Not if the matter occurred before his date of incapacity.

Is this breach of contract

If they are terminating the lease in advance of the natural term then it sounds like a breach. Read the lease carefully for all remedies.

I would be surprised unless there is an open case involving the child currently.

Is there a Statute of limitations for tax liens and if it is expired or soon will be how do I get it removed?

Yes. There is a period of time they can look back. Discuss with an accountant to confirm dates.

What will happen if they sue me?

You may be personally liable for any damages exceeding the car's insurance.

Ambulance bill without an agreement?

Pay the bill. You benefitted from them emergency care.

Who is responsible for damages to the house and missing items?

You should have the property insured and otherwise protected at this point if you have a vested interested in it.

First to file often wins this argument. Take care of your child and this is a not an issue going forward.