A:
No, the Surface 2 does not support a stylus. At least not an active one, like the Surface 2 Pro, or a number of other full Windows 8 devices. It will of course work with any of the capacitive styluses that are marketed towards cell phones and iPads. Those with the bigger rubber tips.
If you really are going to be doing artwork and graphic design, I would do some more research on the Galaxy and the S-pen. That really doesn't support what you are going to want IMHO. You are going to want something with N-Trig or Wacom technology with pressure sensitivity. You will be wanting to run apps like Photoshop,Illustrator, Paint Shop Pro, and neither the Galaxy or the s-Pen are up to that sort of task. Nor is the Surface 2, BTW. You can't load 'legacy' Windows apps, like those I mentioned, on it. Can't load them on the Android based Galaxy, either. I imagine there are some good artist apps for android and iOS even, but if your intent is to get into that, I'd stay with what the industry uses, Windows and Mac (OSX).
Unfortunately, as you probably already know, I'm suggesting spending a bit more, but I think you would be disappointed with the Galaxy given your intent.