The defendant never filed an answer to my complaint,i was unaware i was to file for default.

If the Answer was filed before Default was entered, you won't be able to enter default.

If what you are writing is 100% truthful, it wouldn't be defamation.

Someone that my 42 year old son owed money to, put a mechanic's lien on my property. This debt is not mine, my son not on deed.

A mechanics lien can only be put on a property where improvements were done that weren't paid for. Moreover, if your son doesn't own the...

You can terminate the employee assuming there's no employment contract here.

How do I end a general partnership and get my 50% share if my partner won't cooperate?

You would have to file an action to dissolve the partnership.

Is it legal and proper for a party litigating with another party in two cases, to call two ex parte hearings at the same time?

Yes, two ex parte hearings can be set for the same time, provided the proper procedures were followed and proper notice given for each.

Do I have a case for wrongful termination or something similar?

Assuming that you are an at will employee, no, this would not be a wrongful termination.

How do I remove someone from my home who is not my rental agreement but gets mail at my address

You can file an eviction proceeding against them after giving a three day notice to move out.

In the interest in ruling out lawsuits which might cause a lein to be placed on my personal assets...

If you're going to be doing business in CA, you'll have to register there anyways, so you may as well register there only, instead of having to do...

Breach of lease agreement

The remedies will be laid out in the contract. A full consultation would be necessary to properly advise you. I am a real estate broker...