The currently money in French Polynesia is French Pacific Franc (XPF). It is tied to the Euro. 1 € ≈ 120 XPF.
It is essential to draw money when you arrive. It is often the only method of payment in the islands.
Small idea of the cost of life in Marquesas islands:
A small restaurant: 3 000 F / person ; 6 000 F in a grat restaurant
Bottle of mineral water 1.5 L: 120 F
Bottle of soda 1.5 L: 550 F
Cheap wine brick 1 L: 2 000 F
Bottle of rhum 1L: 3 000 F the local rhum ; 7 000 F the carribean rhum
Cheap cookies package: 450 F
Chocolate bar: 600 F
Rent a pickup for 24 hours: from 12 000 to 15 000 F
Taxi from Hiva Oa airport to the harbour: 1 500 F
Taxi from Taiohae to Nuku Hiva airport: 4 500 F
Wifi internet connexion: 500 F / hour