Am I legally allowed to keep a tenants item of property if they still owe me money for damages?

No, you cannot keep the personal items. You have to return them and you can sue in small claims court if the tenant doesn't pay damages.

Is it legal for a landlord to force his tenets to pay for repairing a broken sewer line (50 years old)

As this is a commercial tenancy, if the lease provides for it, then yes, you are legally obligated to pay for the broken sewer line.

If you are in pro per, yes, the subpoena has to be issued (stamped) by the court clerk first.

Does a realtor or HOA need to legally disclose if you have a mentally ill neighbor (in a condominium)?

It would depend on what the purchase agreement and addendums provided. They would have to be reviewed to properly advise you. I am a real...

Should my dad be getting paid overtime?

Unless your dad is an exempt employee, yes, he should get paid OT. OT is paid after 8 hours in a day or 40 hours in a week. After 12 hours in a...

Can an employer ask you to leave without pay when you give them a 2 week notice?

Assuming that you are an at will employee, yes, this is legal.

Where can I find an attorney that deals with unions

You can search Avvo, Google, Yelp, etc.

Contact DFEH and find out what is going on.

Can i be let go after giving a emotional verbal two weeks and trying to recant 1 hr later

As an at-will employee, yes, you can be let after for the reasons you described.

Employee write up

You don't have to legally sign it, but yes, your employer can fire you for not signing it.