I am a 70 years US Citizen and my wife is a 65 years Indian Citizen. I frequently visit India. Can I petition I-130 for my wife -(along with G-325A for me and my wife) while I am in India and can I give my Indian Address in I-130. I will stay in India until this process is over. Can I send form I-130 to Chicago? What about I-485 and I-864? When are these forms required?
You can file the petition while you are in India, but you have to intend to re-establish domicile in the US concurrently with, or before, your wife enters the US.
Yes, a standalone I-130 filed from outside the US goes to the Chicago Lockbox.
Your wife will go through Consular Processing in India. I-485 is for applying for Adjustment of Status in the US, which is not what your wife is going through; it is not used in this process. I-864 Affidavit of Support will be asked of you during the process.