Can they collect that $100?

Mr Allen is correct about the $100. Have you taken steps to protect your rights re inspection and your security deposit?

Do i have to show up and cooperate or participate with this subpoena. How do i avoid missing half a days wages for missing work?

Do not ignore a subpoena. Call the issuer to see if he/she can convenience you.

Can i do anything in the courtroom, such as sue him for making us live with no ac/heater & for my pets health issues?

The landlord-tenant act also puts the responsibility for the AC on the landlord. But your remedies are limited. You can do a five day written...

Can she move people in a house I rent and pay utilities all in my name

That's illegal. You should be able to get an injunction and damages.

What happens after I file an 'answer' to a civil lawsuit? Will I receive something from the court for the next step?

The next step depends on whether you are in Justice Court or Superior Court. Don't do this without a lawyer's assistance.

Breach of contract is probably six years. Fraud is 3. Negligent misrepresentation is 2. Conversion is 2.

Do I have any grounds to sue for backpayment on rent, furture rent decrease, anything at all???

I basically agree. The accumulated problems may be enough for you to give them a five day written notice announcing termination if the problems...

Notice of Appearance does each lawyer need to be listed?

They don't need to notice every lawyer.

At this point can and should I sue?

The first fact to establish: Do you have written proof that you returned the car when you said you did?

What is my legal recourse as a tenant?

It is the landlord's obligation under the L-T Act. A five -day written notice gives you the right to terminate and get your security deposit back...