I have a car that I got from a dealer in Aug and they call me and said that couldn't get it financed,and that I should bring it

Payment is usually required for things like automobiles.

Maybe the OIC can provide some information: https://www.insurance.wa.gov/

Can a car reprocessed keep the property I had in it hostage?

Maybe you should sue for replevin. See http://app.leg.wa.gov/RCW/default.aspx?cite=7.64. The AG might help: http://www.atg.wa.gov/file-complaint

Can I be demoted while I am on Doctors Care?

The provisions of the FMLA might be applicable. See https://www.lni.wa.gov/workplacerights/

Is it lawful for a vehicle dealership to sell me an additional service contract, but they advertised a free lifetime warranty?

Maybe you should get a refund. See http://www.atg.wa.gov/file-complaint.

Do I mark yes or no on jury summons or job applications about convictions if I have dismissed diversions from juvenile?

See https://www.courts.wa.gov/newsinfo/index.cfm?fa=newsinfo.displayContent&theFile=content/guideToCrimHistoryRecords.

Shouldn’t a parts warranty cover services?

When a warranty says "parts and labor", courts will probably interpret it to mean "parts and labor".

Is this true yes or no?

Washington State subscribes to the Uniform Child Custody Jurisdiction Act (http://app.leg.wa.gov/RCW/default.aspx?cite=26.27.201). There can be...

You should sue them for breach of contract to either get the goods or your money back.

What can i do when someone subscribed me for various magazines i do not want?

Contacting the publishers is probably your realistic recourse.