Why would criminal charges change after arrest?

There is no criminal offense of "larceny" in Texas. What most states call "larceny" is called "theft" in Texas.

Your attorney is telling you the truth. Most (if not all) Texas DA offices require a confidentiality agreement be signed by the defense attorney...

Will I have a any problems if going out the country with two open felony case in different states?

I'm not sure what you mean when you say the cases are "open" but I assume you're saying they're actively being investigated...and nothing more. ...

Can someone be arrested for public intoxication in there own home not causing harm to anyone or self?

Sadly, I've seen this happen many times. It's complete BS, but it happens. You have to be a danger to yourself or others...AND in a public place....

I have a class b misdemeanor(deadly conduct w/a motor vehicle) that was reduced from a DUI. Is it possible to get that expunged?

If you pled guilty and were convicted then you cannot get it expunged. If it was a deferred adjudication probation then you can file a petition...

A warn sign came up twice

Mouthwash is the most common excuse given for interlock failures. Be forewarned that your excuse isn't likely to be given much credibility with...

Do I need to get out of my car after a traffic stop?

Yes, you do. The officer can order you to get out of the car.

Naturalization

I'd have to double-check to be sure, but I don't think a DWI 1st will hurt you in this regard.

I have a warrant for dwi. I was never booked into jail or arrested. Will parole find out about. Has been active for two weeks

It depends on a lot of factors (i.e. which databases they search and how quickly the issuing agency places the warrant in the database - probably...

Can i hire a lawyer to request an appointment to see the court

I'm not understanding your question. Your "appointment" with the court is presumably going to be your next scheduled court date. If you're...