everything
It might be the iPad 3 or iPad HD.
The iPad does not have a Background Colour. You can choose a Photo for your iPad Home Screen and Lock Screen!
Take your iPad the Apple Store, They may be a Problem with the 30pin Connecter on your iPad.
I have a iPad 2 and I got it the day before the iPad 3 came out so it might be $500 or lower
The iPad does not have a camera. Once they make the second-generation iPad it might have one.
It is a unique new kind of device.
You might be able to get a second-hand or refurbished set for 100 dollars.
There isn't any...
In the related links you'll find a picture of an iPad with two things circled; the 3G sensor at the top and the number of GB. If your iPad has a 3G sensor then it is a WiFi + 3G iPad and if it doesn't then it's just a WiFi iPad. Also it shows the number of GB.
No not the 3D because that would mean it will be 3D. No offense but you probably heard wrong, it will be called a 3G maybe. Might be just a IPad 3. It's official name is New iPad.
You can get the iPad with 64 GB anywhere that sells it. The manufacturers might have a stock load full of those kind but price wise, I think not. Try a common retail store like Wal-Mart or Target or even KMart. I also suggest Amazon and EBay.
it is a kind of tablet other than ipad or slide.