Is there a way for someone to appear in court for me?

Talk to an attorney from Texas, they may be able to.

Can I send my final divorce papers for I-751 waiver on the ground of the new 18 month extention I-797 Notice of Action?

Yes you can submit copies but you may or may not have to again.

Can I fly into Mexico from California with 2 misdemeanor DUI warrants?

Very likely especially if there are warrants.

Any exception if I do have a good moral charcter?

What do you mean? An exception for what? You said no criminal record and good moral character? What are you referring to?

Will an 18 year old get arrested if a 16 year old files a restraining order against them after sexual contact has occurred?

It is a possibility. A minor can not consenr to such activity even if both were minors.

Question on I-485 Bars to Adjustment?

More facts are needed. Talk to an attorney.

How much time could i get for taking a package off someones porch...?

Get an attorney, They will get you best possible outcome.^

This is probably a mistake a correctable offense.

Can a prosecutor find out that I've been deported ?

Yes and you are correct in getting an attorney.

DA waited one year to file felony charges against me. Did not get notice. Will I be arrested at the arraignment?

Talk and consult with an attorney to help you with this