So i've just picked my car back up from my local VW dealership after its Service & MOT and was hit with some bad news

This is what the dealership wants to charge me:
1. Alarm Horn Required - £371.65
2. Air Conditioning service due - £73.56
3. New cambelt and tensioner due to age and mileage - £349
4. Brake fluid change required - £59
5. New rear brake pads - £139
Total - £992.21
Basically i nearly fainted when they told me this!
So i need your help people.
Surely the alarm siren can be bought on eBay?
My air conditioning seems fine!
My car has only done 63000 miles.
Brakes seem fine to me!
Maybe these will need doing?
Any suggestions PLEASE comment.
Cheers.