If I hire an attorney to write me a memorandum or prepare a motion but go pro per at the hearing, do I need

No, there is no requirement you disclose this.

I worked 8 hrs. and asked me to extend for 30 mins. more and i didn't.. Is it a ground for termination if i go home after 8 hrs

Yes, this is a proper grounds for termination, assuming you are an at-will employee.

I filed a first amended complaint and had the demurrer taken off calendar, the same day I had my wife mailed out the FAC

No, you can mail it out after you file it.

Why are witnesses many times subpoenaed to give a deposition before a trial?

There are many reasons: to discover information, to assess the witness' credibility, to cross-examine the witness regarding facts of the case, etc.

Your responses need to be mailed out no later than 35 days from the date on the proof of service.

Online retailer accepted order, charged my credit card, sent shipping confirmation, then canceled order - what are my rights?

If they are out of stock, there is nothing you will be able to do to force them to deliver the item. Perhaps in addition to getting a refund, you...

When an Answer is filed, are the defendants answer's viewed as fact over the Plaintiff's allegations?

No, they are not viewed as facts. They are defenses, but must be supported facts and evidence.

Landlord_Tenant issue : My landlord is abusing the right of entry!!how can I stop him and what will happen if I prevent him?

Your landlord has to give you the proper notice and state why they are coming into the unit. What you describe may constitute interference with...

Can my employer change my salary abruptly after agreeing on paper initially ?

You can sue the employer for promissory estoppel.

Is a new employee entitled to payment, if they've lied about their qualifications to work?

You need to pay this employee for all hours the employee has worked, regardless of whether or not his license was taken away.