Hi this is propably too late now but we moved in to our new house six months ago and have a Zanussi ZBF 360 oven, and had no idea how to set the timer / clock. After fiddling around with the oven clock for the last 6 months i managed to set the clock. It shouldn't be much different to the one you have. Hope this helps you and others in the future.
Click the middle button until the little red things on the screen moved round to the clock symbol, then press + or - to get to the correct time, once you have done this it will flash for a few seconds then it will stop flashing and the clock is set. The same goes for the timer to set it when you want to cook something for a period of time eg: ten mins.
As for getting the oven timer to turn it's self on and off I am still messing with it and when i have mastered it I will let people know.
Usually answered in minutes!