Can a property management company continue to attempt to rent out an apartment that was verbally agreed to rent it to me ?

Yes, the property manager can do this. Until you pay the security deposit, you would not have any rights to that apartment.

"Notice of Unavailability" of client prior to the Deposition date.

You can contact opposing counsel and work out a date that works for the deponent.

Can i sue a restaurant if a employee unlocks the restroom and watches someone on the toilet?

Yes, you could sue, but realistically, what are your damages here? You're probably better off having an attorney write a demand letter and...

Yes, your employer can fire you if they discover this. CA is an at-will state, you can get fired for any non-discriminatory reason or no reason at...

Tenant Improvement Contractor Breach of Contract.

It would depend on what exactly your contract with him stated, but generally yes, you could sue him for breach of contract.

How to remedy if filed legal papers were found later with some mistakes? They were filed by attorney not reviewed by client.

You can file an amendment for the document. Or a Notice of Errata.

Is it legal in California for a lawyer/firm to offer money advances before the case is over?

Unless it's a loan modification, a lawyer is free to charge a fee in advance of the case being complete.

You can sue them, but in order to succeed, you will have to show that the tire blowout was due to a problem the car had before you rented it,...

Absent some other issue, such as lack of mental capacity or being a minor, a prisoner can enter into a contract.

Non-refundable true retainer on the contract

It sounds like you will be represented through the pre-trial stage. But the agreement would have to be fully reviewed to advise you properly.