The city of Konstanz has an excellent public transportation network. Visit the Stadtwerke Konstanz (municipal services) websites for more information on bus connections, bus stops, public transportation schedules, bus tickets and prices. To reach the university campus, you can use bus lines 9A, 9B and 11 as well as line 4 via the bus stop in Konstanz-Egg.
The Konstanz ares has excellent infrastructure for cyclists.
You can also search the Ebay want ads for used bicycles in the region.