You've had quite a few good pointers and bum streers so far on this thread.
You can disregard claims on money pits due to cam belts, clutches etc - that's from an owner of a petrol Freelander who's still bitter he made such a school boy error!
However, I notice that the one you are looking at is a manual. The TD4 clutch/flywheel/actuating hydraulics are an expensive nightmare when they go wrong. I think if you are buying TD4, then you are better off looking for an auto - not sure if that's discussed in any of the links in this thread.
Car yards like this know absolutely sweet fanny adams about the cars they sell. They are purely in the business of buying cars cheap, giving them a clean and selling them at high forecourt prices. They may also do some fixes - like sorting out a door handle that's falling off and obviously lowering the value of the car. If the car sounds like its running OK though, they won't try to find if there are any problems with it. They will also be in the business of selling you a warranty as they make cash on the sale of it and if there are any come backs its a lot easier for them to say "claim on the warranty" than "that's a shame, not f**k off".
They won't know how the transmission works on a Freelander, and they probably won't even know if the car has been converted to 2WD.
Personally I've found my Freelander to be ultra reliable. There are a couple of basic issues (tyres & VCU) that can cause big problems. But if you know about them and take care of them - then, as I say, you should be rewarded with good reliable motoring. The only caveat being the maintenance costs for the clutch on TD4. Government stats here show Freelander reliability to be better than Toyota of the same era.
Before you buy, as you've been told, you should always make sure the tyres are identical make/model. This won't tell you its history, but will at least show you what they're like now. Looking at the MOT failures, it did look like all 4 tyres were over or near limit together - that in my book is a good historic sign.
If you can take it for a test drive - be prepared with a ratchet with 32mm socket and 1.2m bar attached to it with a 5kg weight on the end. You can then jack a rear wheel up and do a 1WUT
The 1 Wheel Up Test - is the biggest test you can do to see the health of a Freelander. If you get a time of over 1 minute, budget £300 for a recon VCU (don't know if that includes support bearings). If you get a time over 2 minutes - walk away unless the car is dirt cheap.
Lots of good reading been linked to in this thread. I'd say the most important things to check are what I've described above and detailed in...
https://www.landyzone.co.uk/land-rover/tests-new-freelander-owners-should-do-on-their-car.312863/
https://www.landyzone.co.uk/land-rover/tests-new-freelander-owners-should-do-on-their-car.312863/
Good luck.