The direct answer to your main question is "Yes." Your other assumptions are without basis in law or fact.

Will my chapter 7 bankruptcy affect my cousins car that I co-signed on?

You should have listed the lender on the car as a creditor on Schedule F. In my experience, so long as the payments are made on time, no problem.

How do I fight unreasonable collection of debt from my former landlord who is sending me pre-collection notices?

Moving from Debt Settlement to Landlord/Tenant where you might find more expertise.

Moving from credit repair to consumer protection where you might find more expertise.

Let your Dad know and if he won't do anything, you likely have a social worker assigned to you, or you should. Get the system involved. If you...

Are there lawyers who will help collect small claims judgments?

There are attorneys who run collection mills who might add this to their mix. Search for one.

I didn’t pay my court cost by the deadline. How long will I sit in jail for this?

Moving to criminal defense. I don't have much expertise in this area, but I think it is unlikely you will get picked up before you get that check....

Can I get win if I do a small claim against Best Buy?

You certainly have grounds to sue. Whether it is worth your time is another question.

I know with a court order you can garnish a check for up to 10 years what if they still garnishing your checks after the time?

Why do you believe that the judgment is only active for 10 years?

Advice?

If you are currently in a Ch 13, then this debt should be a part of your payment plan. If you failed to list the HOA as a creditor, and if the...