i want to give my car a service in the next week or so and was wondering what sort of prices vauxhall are likly to charge, while dong it i will be changing the cam belt and water pump at the same time. would i be better getting the parts myself then asking my local garage who my mate works for to do the work, if so what parts are needed to do the service. is it just

spark plugs
oil filter
fuel filter
cam belt kit
water pump