Kone is slightly lost in the north of the island, especially Koniambo's mining site. It's approximately a three hour drive to Noumea.
It all depends on what you're looking for however. If you want nightclubs / bars / etc... then you need to go to Noumea. If you want relaxing beaches, fishing, etc... you need to find someone with a boat. If you want to go hunting, find someone with land.
Renting in Noumea's nicer districts can be fairly expensive (~1000-1500 a month for a studio). I definitely will recommend getting a car, the longer you're planning on staying, the better the car (preferably 4x4 if you're up there).
Anyhow, if you have any other questions, feel free to contact me via private message. I just got to Noumea a month ago (from the US) and I'm trying to get a job with KNS.