Hi Clarky, Welcome to thge TTF..
Service history is very important. cambelt/water pump every 65k miles or 5 years which ever comes first, dash instruments (dashpod) read correctly, coolant temp reaches 90 within a couple of miles & stays there.
Get written confirmation of cambelt/water pump change or reduce price by £500 & get it replaced ASAP.
3.2 V6 no turbo or cambelt to worry about, so should be more reliable, DSG may be weak link, unless you can find a manual.& a nicer exhaust note.
Don't rush into it. A good TT is a wonderful car, a bad un can be a money pit.
Plenty of good uns out there, but probably more bad uns, so as I said don't rush into it.