Mari,
As no one has answered your question, I'll have a go.
NetJets Europe is now onshore with respect to contracts. It's difficult to describe in a few words, but how much tax you pay is dependent on which country you live in. eg, if you live in the UK it's the normal PAYE tax rate. Other countries are on a split Portugal/UK tax deal which comes to about 20% and ?% National insurance.
There is a pension if you're UK based, there's a savings plan for the continental crews. Pension is being worked on.
Health care. It's a BUPA package and it's free.
Usually it's 1 cabin crew member with 2 pilots. This may change if training etc. (I am not on the fleets where there's a FA). The fleets that have a FA are the Hawker 4000 (new), Falcon 2000, 900 and 7X (new), as well as teh Gulfstreams. Flights are medium to ultra long haul depending.