In Canada a DUI is a felony, and Canada doesn't like to admit people who have DUI's on their background. I have always written a letter for my...

Will she be arrested?

Show your receipt to the police officer who questioned you.

6th Amendment been violated or not ?

His rights have most likely not been violated unless he filed a motion for a speedy trial, or otherwise asserts the claim.

The prosecution has to prove you knew your registration was suspended, and you drove while knowing this. The prosecution usually cannot prove this....

No. Speeding is a strict liability crime meaning the prosecution only has to prove that the act happened. The prosecutor doesn't have to prove you...

What is the process and timeframe for an attorney to obtain the evidence against their client?

Your public defender will file for discovery.

How do I access the evidence the prosecutor has against me?

You must file for discovery, and the prosecutor is then required to turn over his evidence.

The judge fined me eight hundred dollars for not having a Georgia drivers license, will end up paying be over 1500

Not really. You can appeal your conviction, unless you plead guilty, but you'll most likely end up in the same place.

Will I be extradited from California for a bench warrant?

I doubt you will be extradited from California over misdemeanors. However, if you ever go through US Customs you will have a problem.

I came through US customs from overseas, to my surprise the customs officer stated I had a warrant in GA,

You should hire an attorney to investigate this for you. The attorney can also clear the matter on your behalf.