Kia Pride BJ 1999, 78000KM, TÜV list of defects, what do I do now ? HELP ! !

In advance to me, I have a Trabant, a Wartburg, and build almost everything myself. So no 2 left hands…. For the winter I drive Kia Pride, built in 1999 with 78000 KM, demonstrably also first possession. Now I have him in the workshop for Tüv and the brake back did not go. Now comes the shock, so it must! the following things are done to get Tüv : Stabilizer : Storage outdated / cracked / porous brake back completely fixed(repair required see further and more The workshop offers me, that you keep the Kia, give me 200 Euro, and at the same time turn on a Seat Arosa, for 1500 Euro and Tüv. (But with more KM like the KIA) Lt. Workshop is not worth to build the Kia, because the sleepers are cut. (But with more KM like the KIA) Lt. Workshop is not worth to build the Kia, because the sleepers are cut. The timing belt is still the 1st and would have to be made. Now my question, what do I do ? Because I know the KM are real at Kia, it has EFH and servo. Also it drives without a breakdown so far, the thresholdrs, I can’t just spat them, or with E welding device nine plates on it, and that leases ? I could do the other things myself, except on the timing belt still ? Well, now the question, what would you do, buy the uncertain Seat, or put some money in the Kia, whereby according to the workshop of the Kia would be a barrel without floor. OK, of course, he is rusted at the wheelrails and the doors below, but he drives and I am satisfied. What would this repair thing cost me, has one possibly sometimes shuffled at the Pride ? Please for help, because I am very confused.