If you are asking whether you have to create the artwork for the prints yourself, then yes, you do. If you are asking whether you have to get the artwork printed yourself, and then sell them through DeviantART (like you would on ebay), then no - DeviantART does all the printing itself. All you have to do is create the artwork, submit it to your profile and then submit it as a print. Whenever someone orders a print, you get the payment and DeviantART does the printing and the sending.
One way is to create a DeviantArt account. It allows you to upload your prints and sell them on the website.
You can't delete your deviantART page.
The DeviantArt Mascot Contest was in 2001
people who viewed your deviantArt page.
DeviantART glitch updates can be found in their Status Forum.
You can't use badges on DeviantART.
No, you do not. It is not required to post artwork to have a deviantart account.
DeviantART was founded August 7th, 2000 by three people; Angelo Sotira, Scott Jarkoff, and Matthew Stephens. Angelo Sotira can be found on deviantart by the username of $spyed. Scott Jarkoff can be found on deviantart by the username of °jark. Matthew Stephens can be found on deviantart by the username of °matteo.
Coppa compliance for websites means you must be 13 or older. So yes, you can be 13 and a deviantART member as deviantART is coppa compliant. You cannot be 12. :)
Assuming one is looking for information about cartoons on deviantArt, the best place to look is deviantArt itself. Wikipedia also has an article about deviantArt.
I think Ninfu is a very cute name to use for a deviantART name.