bicycle: in town or for sport?
Switzerland is a quite bicycle-friendly country either for making sport (bicycle rides or mountain bike) or for moving in the towns.
You can rent bicycles from shops, for instance, have a look to rent-a-bike.ch.
Moreover many towns organize a kind of free bike-sharing service that is very convenient for the everyday transfer or for short ride in the countryside. Note : trains have often special space for bicycles.
If you are motivated for a serious bicycle journey in Switzerland, the site cycling-in-switzerland provides detailed maps, routes, and useful tips for bikers.
Finally, many towns and charming villages organize once per year the so-called « slow-up ». During this day, they are closed to the traffic of motorized vehicles and you can enjoy the journey by foot, by bike or by skates.