You should either hire an attorney to get an order to return the passport to her, or sue her in small claims court.
US Marsalls need a warrant or probable cause to enter a residence without consent. If they have either a warrant or probable cause, they do not need to tell the occupants.
Your California license will NOT be effected by this infraction. Your information is correct.
You can file a petition for expungment without an attorney. Penal Code secction 1203.4 allows the client (defendant) to file without an attorney. The court can also waive the filing fee, if you are unable to afford the filing fee.