Car appreciation... the aesthetics, the engineering, etc

I'm getting insurance quotes on an old VW Passat, it just failed MOT on these. What's likely repair bill? I'm guessing £100 for tyre but not clue on the other one. Keen to have idea before I approach repair garage or agree to buy (private sale). Thanks.

Fail

• Do not drive until repaired (dangerous defects) ] !

•

Tyre has ply or cords exposed Offside Rear [5.2.3 (d) (ii)

• Repair immediately (major defects)

•

Anti-roll bar linkage ball joint dust cover no longer prevents the ingress of dirt Offside From [5.3.4 (b) (ii)]