Can I recieve spousal support from an immigrant husband?

See RCW 26.09.090 Maintenance orders for either spouse or either domestic partner—Factors. (1) In a proceeding for dissolution of marriage or...

Is there a statute of limitation for the modification of a decree of dissolution in Washington State?

It is very rare for courts to change a judgment dividing property in a dissolution.

Can I change the locks on my home (owned prior to this marriage) to compel my husband to move out?

Upon a legal separation, the court is supposed to make a just and equitable division of property considering the factors in RCW...

Yes. It's called a "lis pendens". https://app.leg.wa.gov/RCW/default.aspx?cite=4.28.320

A no contact order issued in conjunction with a criminal proceeding is put in place because of a crime committed against the peace and order of the...

Is this worth going after to cover medical bills?

It's possible you have a cause of action against the trauma center for medical malpractice.

You can indeed commence a civil action alleging "nuisance" and ask for injunctive relief and damages.

Book of business in divorce?

"RCW 26.09.080 Disposition of property and liabilities—Factors. In a proceeding for dissolution of the marriage or domestic partnership, legal...

Visitation Pick up/drop off location? Is there any specific RCW related to this?

Each side can propose pick-up/drop-off provisions in proposed parenting plans. http://www.courts.wa.gov/forms/?fa=forms.contribute&formID=57

How long does a store have to charge you with the following, a theft misdemeanor of less than eight dollars. I returned an item

No misdemeanor may be prosecuted more than one year after its commission. RCW 9A.04.080(k).