You can sue. Then your neighbor will file with the insurance company or they will have to pay for their own lawyer.

Yes, you can file for a Guardianship of your father even if your sister has a POA. Consult with an attorney.

You would need to sue for the excess water bill. You can likely repair and deduct the expense of repair from your rent. Consult with an attorney.

Not pay or sue for the return of the deposit. See an attorney.

Sounds like the dealer's position is that Precision Tune screwed up the motor. If not, then you have a warranty claim under your contract. If so,...

If the seller did give incorrect information, you may have legal recourse. Consult with an attorney.

Unless the dealership knew of a material issue and did not inform you (fraud), then you do not have a strong legal position. The dealership is...

Breaching a contract is not a criminal matter. See an attorney.

Yes, you can sue. Talk with an attorney.

Yes, it is 'legal.' If you do not like how you are treated at work, it's a semi-free country and you can resign.