I got married 2 months ago and my wife took my last name, she required to change her name on Green card too?

She can wait and change her name when she becomes a citizen

I-140 approved with company A. Moving to company B. Trying to get 3 year H1 extension based on the approved I-140 petition.

Yes you can use this approval provided that your former employer cannot revoke your approved I140

Can i travel out of US while my green card is with USCIS for renewal?

You will then have to wait in your home country to reenter unless you are able to get a PR stamp in your passport. It can take 6 months or more to...

I would say yes and disclose at the interview what happened

I have approved I-130. Current date for F2A visa category in visa bulletin have not changed since last 3 months.

You can stay. I doubt the category will move much.

Undocumented spouse of US citizen seeking to legalized

You should file the I130 now and you will do the other forms during the removal process. Consult an attorney to assist you.

I am looking for an attorney to handle paperwork process on bringing my wife of almost 2 years here to the United States

I do not think it is harder after two years. Feel free to call us or go to www.aila.org for a referral

L1 visa

No you can only work for your L1 employer

If a H1b changes employer does it have impact on H4 visa who are in INDIA?

they can travel on their existing h4

Am i still be able to get a visa as like F2A category?

CSPA is a complicated formula. Depends on when you filed. Consult an attorney