You can start by writing a polite but firm letter requesting the return of your things, and entry to the house. If you were lawfully living in that house (i.e., you had the permission of the owner), you may have a claim for the damages due to the lockout.
You probably need to meet with a lawyer to review the paperwork for the upcoming hearing. It is not possible to advise you on-line here, since (a) I cannot see the charges being brought; and (b) advice here is not confidential.
You definitely need to appear at the 9/23/13 hearing.
Best of luck to you.