AB,
Cam position sensors are a common failure point on the TDCi motors. The 1.8 in the focus is literally a 5 min job. From memory the part was £20 or so. Never played with the 2.0 motor, but I imagine it will be similar.
Take engine cover off.
Undo connector to sensor (on top of the cam cover)
Remove fastening bolt (8mm IIRC).
Put it back together.
As for the other bits for the OP.
Headlight bulb – Do this youself. Easy peasy. £5.
Rear bushes – pretty common failure on a lot of cars, decent independent should be a lot cheaper.
Handbrake cable – Is a relatively easy DIY job. Get a Haynes manual and check it out.
Was it explained wht on earth you would need rear hubs?? Are the bearings a bit flakey?
Sounds like the Ford Garage was trying to shift you a new car. Cheeky Feckers.
As said earlier. A decent Garage will sort this for a fraction of the cost and only replace what needs to be replaced.
COnks