Ouch, I have a 2005 touran.
There’s a couple common bits this age like boot lock, door locks either sticking or failing to the point they must be replaced, rust of course, rear springs aren’t common but expected due to age. Some the engines are a bit so so like the bls, the 130/140hp ones are well regarded if you don’t mind a turbo replacement due to age, mileage and often cus remap.
I knew the 1.6tdis are poop, I don’t know enough about the newer ones otherwise
It is indeed a shit hole