3DS doesn't have an application itself to send E-Mail, but you could send E-Mail via the 3DS's internet browser.
Go to your countries' Nintendo website and you'll find an email them to contact by.
The Nintendo DSI, DSI XL, 3DS, 3DS XL, New 3DS, New 3DS XL, and 2DS all take pictures
No.
The Nintendo 3ds is not attached to a phone number so it cannot directly text a cell phone. You can connect to Wi-Fi through the device and send text and other messages via email and other messaging services.
No
No, the Nintendo DS does not use pictures. But you can transfer DSi pictures into the 3DS in a future update.
Each of the Nintendo 3DS's cameras captures pictures in a 640x480 resolution (about .3 megapixels).
The stamps are your pictures located in the Nintendo 3DS Camera Application. They are the ones floating around.
Yes. Although you can't really 'make' videos, you can take pictures and record videos with the Nintendo 3DS
No, you can't upload your photos from your 3DS, but you'll have to, instead, do the process via your SD card.
Yes, the Nintendo 3DS LL is the Japanese name for the Nintendo 3DS XL
The Nintendo 3DS is created by Nintendo from Japan, hence the name 'Nintendo' 3DS