directore,

1)
The N800 comes with a Nokia 5V/890mAh 100-240V 50/60Hz charger (a standard phone charger, not the smallest type). The charger plug is of the new, thin ones that Nokia uses for all their newer phones.

No car charger included, but Nokia and others sell them almost everywhere. (I think there was a car charger included in the N800+navigation kit combo though).

2)
The very first versions of the N800 operating system didn't have support for SDHC, so 2GB was the limit (although non-SDHC 4GB cards would work too). That was never a problem in real life though, as certain members of this forum quickly put together a modified kernel with SDHC support included. That lifted the 2GB limit altogether. Nokia provided "official" SDHC support in an upgrade many months ago, and SDHC support has been with us during the later upgrades. I think you can buy 32GB now, or soon, but in principle you can install a 2TB card if just someone will make one.