Should be on its 2nd belt (2000 miles ago)and I would say water pump should have been done at the same time. Has it been done? Get a diagnostic program and take your pc along to see what, if any, error messages are stored.
Apart from that, the usual. Creaking wishbones, rust on underside strange noises, etc etc. Many threads on here to direct you.
Engine should be cold when starting and make sure it goes up to 90 deg after the test drive otherwise will need a stat.
Mileage should be around 35 - 55, and some say 60 on long drives.
If you chase the answer, it moves away.