Yes. Most providers prefer a full list up front so they can bring the right tools and plan the time. Add every item when you describe the job.

Usually you do, unless your provider's listing says materials are included. Agree who is supplying what when you book so nothing holds up the visit.

Your provider publishes their rate and confirms the price with you before starting. If a job turns out to be bigger than described, your provider will tell you before going further.