How will 2 previous US visa denials (B1 and student visa) affect my immigrant visa application in the future?

Yes previous visa denials may impact a future petition but the extent is unknown without more information.

Can I fly domestic plane in USA with expired 1-94 ?

You should have your valid passport for travel and be cognizant that even domestic travel can present risks when out of status.

How long I have to bee wait to approve for i485 ?

If your i485 was approved including at interview, you should adhere to the advice from the immigration officer at interview re; mailings.

If filing I 320 in USA can I leave the country?This is my father petition for me ? ?

Yes you can depart the country but return may be an issue depending on your status.

I need to get in touch with a great immigration lawyer in my area to help me with filing for my wife to become a U.S. citizen.

You can use the Avvo search tool for assistance with finding a compatible attorney. Good luck.

How long will i receive a letter from uscis if i file i7451?

It takes about 3-4 weeks for receipt notification after mailing.

DO they need to extend their stay in US while I-130 and I-485 are pending?

They do not need to extend their stay while their AOS is pending but they should only travel once they have an approved travel permit (Form I131).

They should not deny the case for failure to send original but for any issues with the response or overall case.

What to answer Question number 23 on n400 for naturalization

Yes you should answer accordingly that you were arrested and explain the circumstances surrounding the arrest.

Affidavit of Support USCIS Form I-864 question?

In your situation you will likely require a financial sponsor to cosign who meets the affidavit of support requirements.