Hm, unless it's your neighbour, roommate or close friend it will be a little hard to share a tablet
http://en.wikipedia.org/wiki/Graphics_tablet
You can buy one from a (online) computer store, ebay or directly from Wacom (most popular but also very expensive brand of tablets). The price differs highly on the size and quality of the tablet. I own three A5-sized ones, two are cheap Lifetec LT 9310 ($35 and $8 from ebay) and the other is a $200 Wacom Graphire4 (yes, I know they're cheaper now but that was the - already reduced - price I paid back then). I prefer using the Lifetecs, though. I had a A4-sized Aiptek 12000U (around $80) before but I have a bad wrist and that size was simply way to huge for me to use it without pain. As long as you don't have a super-huge monitor, the A5 size is perfect.
When you decide on a cheap one, be aware that the brands Medion, Lifetec, Tevion, Cytron, Aiptek and Trust are the very same hardware just with different company names. The tablets are named differently and have a slightly different color and design but the drivers are fully interchangeable. So you don't need to compare them, just go for the cheapest one. However, Wacom is a class higher and generally the one to go.
As for the Naruto logo as psd... this tutorial works great:
http://www.keiichianimeforever.com/guides/naruto/photoshoptext.html
There was a good quality Naruto logo floating around as psd too, but I can't find it atm.
