1. You only have to provide documentation they are asking for (PCCs for countries where you have stayed for 183 days or more).
2. In this case, get an Indian PCC and submit it. At the same time, apply for a US PCC and submit the proof that you've applied for a FBI PCC as well, just in case they need it. You can submit the FBI PCC once you receive it.
3. I'm not sure. You can maybe ask
@harirajmohan
4. They aren't asking you for rent agreements so don't submit that.
5. Again, they haven't asked for that so you don't have to submit that.
6. Unlikely as this is just a PCC request. This isn't exactly a RQ IMO.