When you get payed fully cash for your hours, is the employee required to pay for your overtime too?

Yes. The form of payment doesn't determine whether your employer has to pay overtime.

What my boss told others I was getting fired, and I got back to me?

You haven't described an unlawful act.

The answer to your question is NO...

I have a feeling your son's case is not good.

Do I need an attorney in order to put in a complaint about sexual harrasment and other things happening at work,&being imigrant?

Your legal status doesn't matter. Sue your employer for sexual harassment and wage and hour violations galore.

It's been 3 weeks already and I have not received my final checks?

You can get up to 30 days of waiting time penalties for your employer's willful failure to pay you all final wages upon layoff.

Your employer can't fire you for refusing to perform work that would result in a violation of Cal/OSHA regs AND be a real or apparent threat to you...

Can I sue Wal-Mart ?

Unclear how a toilet paper dispenser cut you.

Extortion? Black mail? Or freedom of speech?

Threatening to publicly humiliate someone if they don't pay is extortion.

My employer doesn't issue breaks or meal breaks during my 8 hour shift, to cover their end they made us sign a waiver

You can't waive a meal period under these circumstances if you're nonexempt. You can, however, agree to an on-duty meal period, but only if the...