The Sheriff's Office Civil Process Unit does not provide forms or assistance in filling out forms used for filing of legal documents with the court. The California Judicial Council has provided a forms page on their website that has Judicial Council forms for Civil Court that you may want to file. For domestic violence restraining orders there is a self help section where you can get help online in putting your declaration together.
This website does not include non-Judicial Council forms such as late notices, 3, 30 or 60 day Notices to Quit or Pay Rent. Non-Judicial Council forms can be purchased at office supply stores and online by doing a search for those specific types of forms.