R4 Scrapyard or revive

Servus, got yesterday a R4 which failed at the Tüv check. I don’t know yet, since I receive the letter only next week.The R4 has in front still brake drum seems to me to be an older model. But it has only 57000 km down. The wekstatt has the following challenged wheel brake cylinder in the rear leaks, brake cheeks also have to be ern.. Inequal brake values on the front axle at foot and hand brake. r worn-out tires at the back and a little rusting on the threshold at the front right.And the switchbar has a little bit of a game.Now I don’t really know about the R4 and ask for advice and it’s worth it to repererate it, where I get rep.infos and spare parts except at my friendly.The dashboard is also cut off at one end and the seats sinbd pretty much sat down Am for every advice Grateful