PPJN is correct basically.
As a foreigner you will be employed by click4sky, not CSA directly, however this makes little difference today (though there are rumors of creating 2 airlines out of CSA, making the ATR fleet a regional airline under click4sky).
If you think that 2000 Euro is 6 times the standard salary of a worker, then you can imagine that your lifestyle is higher than in most western companies.
CSA and the local CAA will accept your TC licence and pay you and give you time off while converting to JAA (within a year). You will be flying on the right seat of their ATR fleet for a minimum of 2-3 years, then either go to the Airbus fleet or the left seat of the ATR. - This is minimums, can be as long as 7 years, depending on requirements and ability.
The Boeings are on their way out, brand new Airbusses on their way. You will never get onto the A310 fleet. On the ATR, you have very little night flying and a fair amount of overnights. The hotels are quite good and you go to the hotel even for 2-3 hours.
hope this helps, IP