-go to www.fpscreator.com. The packs sold there will work with x10 eventually if they don't already.
1. No, I'm pretty sure you can't do real motion blur...yet
2. Yes, it's easy if you know how to use photoshop
3. No, unfortunately.
4. No, not from x10. You would have to rig the facial animations yourself and script them to play along with the sound. Definitely not recommended for beginners
5. You potentially could with extensive scripting, so I guess it's possible.
6. Not sure exactly what you mean, but the stock weapons with x10 don't come with hands visible.
7. FPSC's multiplayer is pretty limited. All I know is that yes, you can host servers and have other people with the same client join. I also know that it's more complicated than mainstream games.