You need to hire an attorney to file the appropriate action so you can obtain temporary custody. And when you say the father is not in the...

You need to consult the terms of the trust about who serves as successor or appointing a successor and follow that.

Those issues could have been addressed in a probate case, but now that your mother has been dead for 4 years there is nothing you can do.

You probably need to hire an attorney to file the appropriate paper work at court for you to become the emergency guardian.

There are too many factors that would go into that decision that make it impossible to answer here. Such as, what type of trust is it, who would be...

If she send you a proper, Indiana power of attorney, all you need to do is sign it in the presence of a notary and return the original to her.

You will need to have him do a full power of attorney for you, so you execute all documents necessary to do that.

You need to consult with an attorney about obtaining guardianship over your grand parents. This is probably not something you can do yourself.

She cannot change his will with a POA. While she could deal with his property while he is alive, such actions could be challenged later. I think...

That is not true. Whomever is your guardian now needs to represent your interests to make sure you get your share.