If you have not filed any application based on your marriage, but are merely planning to do so, then you are not in the process of filing. If you...

Just tell them at the interview you have traffic violations from long ago.

I think an exact quote is required to know how to answer your question. In addition one needs to know the other facts in your friends case such as...

Generally an immigration lawyers does not locate sponsors for people. You should find a sponsor and then hire an immigration lawyer.

If he has zero include, then no. But in the more likely event that he is collecting a pension and social security, then yes.

You will need to file for "asylum" at the immigration court, but of course you may have a bar since you are filing over one year since you arrived,...

No, because you are not eligible for the adjustment until you have been granted a waiver. And even if you were able to do that, if you are denied...

It should be marked on the application that it is for concurrent employment.

The U.S. government determines who can stay in the U.S. and who cannot. A permanent resident can stay in the U.S. indefinitely and does not need...

If you registered, despite not being required to register, it seems to me that in fact you are registered for the selective service.