60k in the UK is above average , but is 87K in Swiss at current xchange rates, which is only marginally more than a secretary would get.
If your employer pays for housing (which will be your biggest cost by far) then you can live comfortably... if not then you should be looking to earn 180+CHF to afford a house (or semi detached) since that will cost you around 60 to 80 minumim a year... on 160/180+ you'll have a comfortable life...
health insurance for a family of three is around 1000 per month...
Car lease is around 500 depending on model and value (can be three times that or more)
Schools ; local schools are free... private are from 20k per child per year as said above... from age 6..
Travel...depends on where you live... figure from 60chf per month for inner geneva.. outside add more depending on distance.
Have a look at Nyon area Gland, prangins, founex etc etc for houses on www.immostreet.ch... you'll get an idea of costs.
Commutes from here are 30 mins train and car.