Salary already indicated.
Usually positions like this are on rolling contracts (about 5 years or so) so imagine that they'll have a pension scheme of sorts but you may be etter off making your own private arrangements.
If you look on the appropriate web sites (with the help of Google) you'll find all you need to know about the cost of living.
Property rental isn't cheap, but if you share a house or similar, it brings costs down.
The Swiss transport system is very well catered for, and in the major cities etc there's no need to own a car as the trains, trams and bus networks are very good.
The only downside would be if you needed to be "back home" on a regular basis, Zurich to most of Europe is no more than around 2 hours, to elsewhere its a lot longer and more expensive.