You are best served by bringing on a probate attorney to help you.

We married in Maui end of May this year because of differences we want to annul ...possible? Or should we apply for divorce?

Under these facts, you don't qualify for an annulment in CA. You could possibly get a summary dissolution though.

Can I collect the advertising fee from the business who has a billboard on my father's property?

No one can actually answer this as there is probably an agreement between the billboard company and your father that is part of the estate. Talk...

My dads probate was finalized last year. But i just got proof that my brother was adopted. How long do i have to reopen the case

Maybe you can't. If your brother got notice and did nothing about this, then the matter is closed out. It's your brother's burden actually.

How to get my will be ex husband's title of the house?

You would need to have an Interspousal Transfer Deed for California executed and then recorded. Suggest you have an attorney help you with this as...

Is it possible to rescind Mediation settlement agreement in CA PROBATE CASE ?

Overturning a mediation settlement is difficult. You would need to show that you signed and agreed under duress and/or coercion.

What are my dad's options?

A probate attorney should be brought into this matter.

How can I get my deceased mother's belongings out of her husbands house who has just died

How you depends on the value of the estate and who is handling the deceased husbands estate. Talk to a probate attorney.

After my father passed away my brother and sister came in and stole deeds and my sister obtained my father's death certificate

Hire a probate attorney to file a probate case to administer the estate.

Talk to a probate attorney who practices in AZ.