Give your tenant 60 days' notice to get out and evict the tenant and tenant's guest.

Sounds like a waste of time. He hired you when you were forty-three, now that you are 46, he is discriminating against you? Perhaps you should...

Yes, you can sue a furniture store.

You might sue for conversion if he kept your tools. You might make a police report and attempt to pick up your tools with the police if they will...

Sounds like it is your parent's car and parents were allowing you to use it. Their name is on the title, right? Sounds like you are out of luck.

You might be able to sue based on negligence or a failure to maintain premises. See an attorney.

No, someone cannot keep your property because they permitted you to locate it on their land.

If you have not paid rent, then the landlord is likely to prevail in an eviction.

Probably not. You know what the rent is and you have been paying it and presumably extending your contract for years.

Have you considered bankruptcy? It might be the most efficient way to handle your situation and eliminate your debt.