Health insurance cost in Switzerland depends on what level of cover you want. 500 CHF a month is pretty standard.
If you live in France you pay tax and social security in Switzerland, and private health insurance in France. Basic cover is about 80 euros a month. Good cover 150 euros a month.
If you live in France you can chose to file a Swiss tax return each year (to get deductions for pension, travel costs, house renovation etc), but you must file a tax return in France. It is pretty straightforward if your only income source is your salary. You get a letter back from the French authorities saying you owe no tax. It is simply a form filling exercise so that you are accounted for as a French resident.
Last edited by Full Left Rudder; 30th Aug 2012 at 13:19.