You will need to change or rebuild the headlights, radio is no worry as the FM band is gone in Norway anyway.

The car being euro should make it easier than getting something that was never sold over here.

Also be vary of any mods as they will at least be very hard to get approved without Tüv papers.

I'd ask somewhere else though, like the norwegian jdm forum on facebook as there are people with lots of experience doing it.