Your question is too confusing to fully answer here. But depending on how things were titled it sounds like most of the assets passed to her...

You don't say whether there is a will or not. But you should receive your mother's share under intestacy. You should consult an attorney.

He cannot collect on step father's benefits. ........................................................................

It would be too late to challenge that, unless you just turned 18. ..........................................................

It sounds like these people are tenants at will. You need to follow Indiana law about sending them notice to vacate and then if they don't, file an...

There is no way for you to get someone's will before they die, other than asking them to show it to you. As to the trust situation you need to...

It means that person would be treated however the will provides for predeceased heirs. ................

It is not entirely clear what the point of your question is, especially at this date. But the deed, and the history of deeds, is a public record...

You will need to hire an attorney and file for guardianship over your father..........................................

Assuming you have all your financial records it should not be that hard for you to put an accounting together and as long as you can show that you...