Can you, yes. Is it advisable, no. If there is litigation, you as an executor will need to hire an attorney for the litigation portion as you...

Not if your argument is based on the probate code - probate court is the right jurisdiction.

Just the deed gets recorded. California does not record trusts.

He can but it would be at his discretion. I would consider filing a declaration for the next hearing and ask for sanctions. No guarantee you will...

Roommates have no right to your father's belongings.

Yes, he can assign his interest to your father. An attorney can help.

MSJ will be hard on those facts due to the inconsistency. Do a meet and confer and get them to amend their answers to be consistent.

If the attorney was the witness, then yes. If there is a second witness, use that person instead.

Contact MetLife and give them your name, company name, and social security number. They will give you your plan number.

Yes you can sue your brother to ask the court to force him to share and/or make copies of the pictures.