Hi Gladreemer,
Paid in France, in Euros, French social security (~22%) is taken out of your monthly salary and income tax is a bill at the end of the year. Income tax is variable and depends greatly on your domestic situation.
The French contract is the best in ezy both in terms of salary and working conditions. Congratulations on passing the selection!
Roissy is cheap and right next to the airport with buses running to/from the airport from 0500-0100. They're hotel shuttles, but shhhh