so here is answer for all the others (EU) - it means Belgie, Estonia, Greece, Ireland, Island, Latvia, Lithuania, Luxemburg, Malta, Netherland, Norway, Poland, Slovak, Slovenia, Czech rep. and Cyprus.

If you are in same situation as I was you should insure all your family in Swiss, ask the insurance for form E106 with this form register in your local insurance at your home country and than you (or whoever is on the form) will be entitled to FULL mediacal care in home country.
When you get insurance in switzerland you should report it in your home country and they will temporarily cancel your home insurance - it is not possible to be insured in 2 EU countries.

Or you do not tell to anybody anything - keep your home country health insurance (in CZ the goverment pays the health insurance for kids and for wifes which do not have income and are home with kids) and get also Swiss one. This is not a correct and you may be facing some penalties once your home insurance find about this, but currently there is not way they will find about it as the insurance systems are very isolated.