Driving in Zurich is not recommended. City planners have gone out of their way to make things difficult for drivers. More and more streets are being converted to pedestrian only and trams have the ability to turn lights red in order to continue driving unimpeded. Gas is very expensive, as are tolls and congestion charges.
Consequently, driving should only be considered if you're going off the beaten path. Nearly all of the top tourist attractions of Zurich and Switzerland in general are accessible by train and other types of public transport. If you do insist, a valid international license is required. Driving is on the right side of the road. The minimum age is 18.