Just some other comments :
- usually they say that you should not pay more than one third of your gross salary for rent. You should be able to get a 2.5 Zimmer Wohnung (1 bedroom flat) in ZH area for around 1,400 - 2,000 Sfr/month depending on how much luxury you need, lake view, near train / tram stop etc. You will need to look at several before you get use to what you get expect / value for money etc. Sounds a lot but usually its high standard
- Living expenses (food, restaurants, drinks etc) are high - but not nearly as bad as London or some other major cities
- If you're single - stay in the city. If you want peace & quiet or have kids then move out to the surrounding countryside
- If you stay in the city area - you won't need a car. Some have one for skiing etc - but the experience of getting stuck on the motorway to and from ski resorts at the weekend whilst whatching an express train wizz by really pisses you off...
- in the insurance biz - you should be ok with English. Don't bother trying to learn German before you come: The dialect here - Mundart or Schwyerduetsch is very different. Most Swiss people don't like to talk High German - you can slowly pick up the lingo or even enrole into Swiss German classes once you're here. You will make friends much quicker if you at least try to say a couple of words

Be more specific with some of your questions - its easier to give a more helpful reply

Good Luck
All the best
Roobarb