You cannot forcibly remove him. Best to not invite him if this is a legitimate fear.

Yes you should bring your passport for travel history purposes.

Yes you should submit the change of address at this time.

No you shouldn’t have any issues if otherwise filed properly.

This is a serious issue. Consult with an attorney for guidance.

Yes but the processing will take 12-16 years.

Yes you should wait to complete medical until instructed to do so.

Yes you may upload the sealed PCC and later provide to interviewing office.

Consult with an attorney to understand the process more clearly.

Every case processing is different and very normal even though they were filed at the same time.