Ok, you need then oil change, filters etc...
£200.00 ish.
Dependent on your milage/age. You may need a new Cam belt/water pump. Which is an additional £300-400 dependent on where you go.
If you do get a new cam/water pump. Get a metal impellor pump, as they are much better quality and less prone to failure (due to the impellor parts not cracking like the nylon ones do)