Yes. CA exemptions may be used to protect equity in vehicle. Creditor has secured interest in vehicle.

In absence if valid will or marriage, you have no right superior to partner's brother to administer estate. However, daughters do have inheritance...

Possibly. You may file creditor claim against estate. You will need attorney assistance. Link...

Yes. Simple probate necessary. Begin by consulting probate counsel in area.

No. You do not "qualify for squatter laws". Review facts with counsel for possible recovery of amounts paid to seller.

Yes. You must file response to motion to vacate or risk default.

If you are beneficiary, you have right to accounting and to be kept informed. Much more case specific information needed to advise further. Begin...

Possibly. Review proposed judgment with FL counsel to determine rights pending final orders.

Yes. Both you and employer has duty to verify validity of garnishment order. This is shared duty.

Consult AZ counsel to investigate and address AZ bench warrant.