You are facing some serious issues - too serious to handle yourself and too serious to leave to advice from an online forum. Go see an attorney...

Start by contacting the local police. This sort of conduct can be criminal. It may also be of interest to the FBI since it involves multiple...

Do I have to pay the trim of my neighbors tree and bush that brings rats passing to my property?

You can trim any part of the tree or bush that encroaches on to your property. You can ask the neighbor to pay for that, but may have a difficult...

Just to add to what the others said, you should probably check with your employer about whether he wants you to take such action. Some advertising...

What kind of rights does a property owner have to protect his property from vandalism and other bad behaviors?

A common fence is equally owned by both property owners and each owner is equally responsible for maintaining it, and individually responsible for...

Do I have to pay for a landscaper? And am I required to maintain the lawn even in a state of emergency caused by drought?

If your lease states they you are required to maintain the lawn, then you are required to do so. Even if the lease expired. The old terms still...

Noise problem from upstairs neighbor, well past 10m against HOA rules, waking me from sleep. health is suffering. HOA knows.

Turning on a faucet is probably not prohibited by any HOA rules, even after 11pm. If there is a problem with the pipes, that may be the HOA's...

What exactly are my rights as a residential tenant (not guest) at a hotel I am living in?

Your post is a bit confusing. I am not sure if you are a tenant in a residential property, or a lodger in a hotel. The distinction is important...

City took back my rented garden, saying that I am not resident, when I built great fruit garden . Isn't it discrimination?

You need to speak with a landlord-tenant attorney in your area. Use the find a lawyer link above. You may also want to talk with a local...

I need code numbers for landlord tenant law in California.

The link that Mr. Ilmanen pointed out is definitely a better place for you to start. The codes are just that. The booklet at the link will...