Bought a car at the dealership - dealership changed mind ?

The car is no longer theirs. They cannot rescind or stop the sale. If they had made a significant miscalculation to their detriment, they have a...

My car was parked in my assigned space. The leasing company assigned the space to a 2nd tenant who had me towed.

As a lessee, you cannot dictate the conditions of the lease ex post facto. What you can do is recover damages in a small claims court pro per.

What legal grounds do I have to keep my car in my possession?

Why would you want to keep the car with her on the title? Yes, you will likely prevail in small claims court bc your brother in law will confirm...

I agree with my esteemed colleague. You will only incur more liability if you continue defaulting.

Can you sue or get your money back from business coaches who were frauds?

No, you received services, there was a valid contract, and what they called themselves is irrelevant.

Do I legally have to take a car back 3 days after selling it in California?

No, you are not obligated to take the car back. They would have to sue you - which they won't.

Bank put me on a temporary payment plan until my loan is modified. First they said three months its been 5 going to 6,

A thorough review of documents is required to answer this question. Contact a transactional attorney in your area.

You need to hire an attorney. They will not respect you pro per.

Yes, in this case it would be illegal and you may be criminally charged if you do. Return the car, let them reposes it, be nice about it,...

Will I be able to get a continuance for a master calendar hearing ?

Yes you can. I would write a letter directly to the judge or the other party.