Can my landlord contact me for payment of rent after filing an unlawful detainer against me?

Yes, your obligation to pay rent remains in effect despite the unlawful detainer. Landlord can contact you regarding this.

Can I sue a car salesperson or dealership for selling us a used car that broke down the 1st time we drove it?

This may be breach of contract, breach of warranty and possibly (more facts are needed) misrepresentation. You may also have products liability...

You can contest the ticket, or you can pay it. I would contest it and ask for leniency.

Is it illegal to hit a girl?

Yes, it is illegal to hit other people. You can face both criminal and civil penalties.

Is this harassment? Can i get a restraining order? And how?

The matter involving the phone is a small claims matter. They will have to show what the phone was worth at the time of breaking, not brand new...

I would read the lease agreement first. It may contain language authorized AVIS to charge you these fees. Take the lease to an attorney to review.

I owe a bail bonds?

They can sue you in small claims and/or civil court to enforce the contract.

Will I have to pay citation for a code violation that i think does not apply?

You can/should contest the citation. ________________________________________________________________________________

I unknowingly sent a nude picture of myself to a minor and she is extorting me for money threating to post said pictures

SCAM! We see posts like this several times a week.

Can he get in trouble for child pornography

The question is can "he get in trouble." Reality is they both can, and these matters are serious.