Piano Tuning, Restoration & Repair Job - Kunune Park, EC, 6025

I have an old piano that needs some repair. About 4 of the notes are not working. Probably need to be restrung. Not sure . It also needs to be tuned. Would like to know maybe a ball park figure for such a repair and tune. Thanks . We got the piano from a family friend as my daughter needed to use it during the lockdown for school music lessons.