Got H1 while in India, did not get it stamped, currently in US with H4 visa No pay stubs- am I eligible for H1 transfer?

Yes, the employer's attorney can file to amend the petition to get you a I-94 so you can work on the H1.

Employment Authorization Document for my spouse traveling with me on L2.

EAD takes up to 90 days. He will need to be in the US for the biometrics.

Do I need to file the G325A along with the I-130 for a step child. Do I need to include copies of my Naturalization certificate?

Dont need 325A. Need the others.

Is it possible for to obtain US B1/B2 Multi visa if I broke the law?

Depends on the crime you committed and whether you were convicted.

After how many years on J1 waiver job can some body file for a green card?

Depends on the category you are filing under.

Can my wife sponsor me for a green card and she has that many felonies? I have NO felonies.

You should consult with a local attorney who also handles criminal matters and can advice you about this.

Can 7-yr old stepchild w/ 10-yr green card go to home country to live with biological father for 2 years and then return to USA?

I agree with my colleagues.

How long does it take to get the green card through marriage approved? and how much are the fees?

If a US citizen sponsors, it takes 3-9 months for the whole process. You get a travel document in 60 days and work permit in 90 days, if you file...

Need an immigration advice ..

She is probably young, unmarried and educated. I would suggest showing evidence that she will return to India after a short visit. Depending on her...

It will depend on how the name is being changed. If you are adding a space between the names, it should be fine without having to get a new visa.