Can I sue my employer insurance company?

There are many ways to approach this. As explained in the previous response, worker's comp is one avenue. You also need to look into the at fault...

How can I find out what forms to fill out to start a succession and how to fill them out right ?

There isn't really a "form" that can be filled out to do a succession. I suggest you contact an experienced probate attorney to help you with this.

Based on the info you've provided, it sounds like your case should have decent value.

Dad died no will then two mths later steom passes who gets the estaes ?

It will depend on whether the house was community property. If it was your dad's separate property -- he owned it prior to his marriage with you...

What can I do?

Consult with an attorney asap. Most will provide a free consultation and work on contingency fee arrangements for this type of case, so you will...

This definitely sounds like an incident that you would want to consult an attorney about.

My car was hit on front door on the private parking area and other driver was driving without seeing on the front of the road?

I second the above answer. This is probably a case that you need to hire an attorney to help you with if they are denying liability.

You would probably want to petition the court for a declaratory judgment.

Is there a reason you need to buy him out in advance of filing the succession? It would be pretty easy to file everything at once.

DOES PAYING TAXES ON LAND SAVE IT FROM SQUATTERS IN LA. ?

I would start by getting a survey, as the aerial maps are not always reliable. If the neighbor is indeed on your property, approach him with this...