Some courts require an actual conversation. If you have a conversation, take careful notes and confirm them in an email after the conversation.

The deadline is the same as the filing due date. Ask the other side to email you a copy or get it from the court. In your Reply you can point out...

You will need to locate her by investigation yourself or hiring an investigator.

Consult with experienced real estate attorneys. Use the Avvo search tool to find an attorney. https://www.avvo.com/find-a-lawyer

Be wary of providing them any information. Check the court to see if anything was filed.

It depends on how strict the courts are and if the requests are truly objectionable.

You may have a lawsuit against the seller and broker. Consult with experienced attorneys. Use the Avvo search tool to find an attorney....

The lender will not let you off the loan. Your co signer would have to pay off or refinance the vehicle.

If it is still timely you can. Otherwise you can request to reopen the motion already filed.

Yes, failure to file a declaration could be fatal. The foundation depends on the type of document.