Go to the Register of Wills and review the Estate. If something seems off, get an attorney. DO NOT SIGN ANY WAIVERS until you have knowledge.

What does the lease say? It is controlling..

You can, but it will cost you in attorney fees. You have to decide whether it would be worth it.

Go with your insurance company's suggested body shop. Why would the HOA be responsible for loss in another lot?

If he will not move out, you can file in the circuit court for possession of the property.

Your brother has to agree to add her or he has to agree to be removed. Deeds have to be prepared by attorneys.

30 days written notice and then file a Writ of Detainer in the district court of your county

Alternatively, since you did not mention a security deposit issue, you could just wait for them to sue you.

Change the locks and wait for her to call you.

You have not said what you are intending to demand. But it makes no difference if you cannot reach her.