Obviously the usual service items will need doing like the oil, oil filter and air filter but then you could do these yourself. You can check the condition of the plugs to see if they need replacing and don't buy them from an Alfa dealer if they do. Winter is upon us so check the anti freeze level and condition. The breaks are easy enough providing you don't have problems with the rear caliper hand brake assembly. This can be a pain.
The cam belt and tensioner (and balancer shaft for the 2 litre) are a piece of **** (if you have the cam locks) BUT before replacing the cam belt it would be wise for you to ensure that the cam variator is ok and doesn't need replacing. If you replace the belt and tensioner and the variator goes somewhere down the line you'll need to replace the belt and tensioner again when replacing the variator. My variator started to die at around 49,000 miles. If it's not working properly you will have what sounds like diesel knock at around 1500/2000 rpm or lower to start with especially when the engine is cold. This will gradually become worse as the variator weakens until it knocks all the time.