Since I don't have a Wacom tablet, I'd like to be able to use my surface like a Wacom tablet and have the things I draw on it show up in Photoshop on my desktop computer. Is there any way to do this?
So here's the deal as above the Surface RT doesn't have the active digitizer technology of the Surface Pro's or Surface 3. In essence the screen is like that of most Android tablets or iPads which leads to the type of solution you could use. http://thewirecutter.com/reviews/best-ipad-stylus/ a Capacitive Stylus like those used on other tablets will work on a Surface 2 also. I have used the Bamboo stylus on Surface 2.
Photoshop? You can get PhotoShop Express in the Store for Surface 2 There may be a couple other light drawing tools... Bamboo Paper is available for Arm (Surface 2).