In answering your questions, you have to first understand that it is not my intend to teach you in evading the responsibility of obeying the law, but simply California legal system is ill-structured (and that's why I will not exactly teach you how to do that).
1. Your license is at risk.
Your license is set to be suspended within 30 days after you are arrest (the police should have given a notice to you already). In this case, you will need request a hearing from DMV to keep your driving privilege (even it may be restricted). Otherwise, even you may not guilty after all, your license can be still subject to suspension.
And remember - driving while under license suspension is a serious offense - so you can effectively throw your Taiwanese license away.
2. What exactly is the police charging you?
DUI is a misdemeanor by itself that can make you face jail time (but it is not usual for first time offender). While at the same time, you are charged with something else. Depending on the charge itself (you should be able to see that in your Notice to Arrest), the judge may impose jail time for you (as in theory (not legally), exceeding speed limit by 30 MPH can consider reckless.
Money is first. Second, DUI is a criminal record. So you know the rest.
In theory, the U.S. can deny any future visa or deport you based on DUI.
4. Your Defense
Do you need a lawyer? Maybe. Depending on what you are looking for.
If you plan to plead guilty, then no - most lawyers won't be able to reduce sentencing for you (You can try to ask any lawyers and see. Beside, you can also plead bargain yourself with District Attorney anyway.)
If you plan to evade your legal responsibility (not guilty), unless you can understand and handle the situation well, then a lawyer is needed.
Usually, in California, there are several ways you can avoid the legal consequences of what you have done (with proven success):
2011-12-27 05:53:12 補充：
My answer is too long. So I will continue here:
a. Speedy Trial Defense
Under U.S. and California, your hearing must be set within 45 days after your arrignment.
Since there is no way that it can be done - all charges you are facing must be dismissed.
2011-12-27 05:53:21 補充：
b. Admissibility Defense
Let's say you are only facing speeding and DUI. In most of the cases, what police get is not admissible to the court, only if you can successfully attack its admissibility.
If you do it right, you should be able to get away with no consequences at all.
2011-12-27 05:53:44 補充：
So bottom line - lesson learned and don't ever do that again.
2011-12-27 09:23:26 補充：
1. Trust me - the worst is not yet coming.
Remember - DUI is a official criminal record. It stays with your life the whole life.
And basically, don't bother go to Canada at all (Canada is a country that is known to deny entry for DUI-related offense).
2011-12-27 09:24:48 補充：
2. It is relatively simple in fixing the car issue - simply tell your rental company that you want to extend the rental.
Ask one of your friend to go with you and pick up the car, assuming you can pay the fee.
2011-12-27 09:27:18 補充：
3. To D.A., DUI is a slam dunk conviction, so there is no point that they will let you to go easily.
4. If you can't afford to pay, imprisonment is always an option for you.
2011-12-27 09:29:04 補充：
5. Last but not the least, as soon as you are recorded in the prison system, ICE can remove you immediately (In other word, county jail can transfer you to ICE detention without releasing you).
Trust me - you do get what you deserve. But I do have my reasons why I want to help you to get away.
2011-12-27 17:01:06 補充：
My answer to your question is already at the front.
An attorney can only help you if you don't know the procedure. Otherwise, attorney is useless.
2011-12-29 01:56:42 補充：
s - DUI is a misdemeanor which is a criminal record, if convicted.
2011-12-29 01:57:59 補充：
逼機人33代 - Trust me - you have enough scare already - you don't need another one from the legal proceeding.
It seems that the consensus here is even you did admit what you have done, most of us in fact advice you not to plead guilty.
If you insist on pleading guilty, you are digging your grave.
2011-12-30 00:07:05 補充：
Go to DMV and request a hearing.