Yes, a lawyer licensed to practice law in California can practice law anywhere in California. The real question is one of practicality. Given the numerous court appearances that are usually required for proper defense of a DUI case, it doesn't make much sense to have a lawyer based in LA defend a DUI case in Sacramento.
Absolutely. An attorney has a legal and ethical obligation to zealously pursue all meritorious claims on behalf of his or her client. Your attorney should also return your phone calls and answer your questions regarding your case. Based on the information you have provided, it seems that your lawyer isn't living up to this standard. That said, I agree with my fellow attorneys on this one. Seek new counsel immediately. It is your right to do so, and probably in your best interest.
I agree with Mr. Chen, unless and until a foreclosure sale does take place, you are obligated to keep paying rent. Failure to do so may result in your landlord filing an unlawful detainer case against you.
No, a text message telling you that you have 3-days is not a proper 3-day notice. By law, she cannot file a meritorious eviction lawsuit against you unless and until she serves you with a proper 3-day notice.
You can have this case thrown out if the landlord does file a unlawful detainer proceeding against you. Before an eviction a landlord must serve a 3-day notice, since no 3-day notice was served to you, your landlord will not be successful in evicting you under these facts.
The short answer is yes, you can sue yourself. But the real question is wether you should even consider proceeding without a lawyer. Having a lawyer represent you usually adds tremendous value to your case. It is possible that you will recovering more with your attorney, even after paying his or her fees, then you will recover if you represent yourself - especially if you're considering taking the first settlement offer.
Based on the information you provided, it seems that you may have a claim for what is known as a "private nuisance." If you are successful in proving this case, you may have a judge issue an injunction - which is a court order telling your neighbors to stop doing what they're doing, - as well as potentially recover for monetary damages, depending on the facts of the case. However, proving that your neighbors are creating a private nuisance can be a nuanced and complicated matter - for that...
It seems that your ex-boyfriend has abandoned his personal property. That said, the law has some requirements in this area that must be followed if your ex-boyfriend was a "paying guest" or a "sublessee". Depending on the value of the personal property left behind, it may be in your best interest to consult with an attorney in your area who can help you sort through this issue.