Hi berndesi1
Finding accomodation, good accomodation in Switzerland is a challenge for news desis, compounded by the language issue as most of us dont speak German/French. Also, you can`t directly walk up to an apartment or to-let unlike in other parts of the world.
In most large cities, there are a number of desis and associations (
list) from whom one can get a reference to local real-estate/rental agents. Many agents understand expat cultures and also English so it is easy to work with them. They will also generally take care of paperwork like Lease, contracts etc
Even if you go with an agent, you should still be cautious and make sure you understand the terms and contract.