While not all Touhou games are STG's. They are some of my favorite Curtain Fire games I've ever played. Though how would you really implement that in Oblivion? What would you put from those games into Oblivion to make it work?
I know on the 360, holding the right stick for a little while starts to allow you to pan the camera as long as its held down. So itd be the change view key that you use for it on the pc I think.
That is probably the mod..as the other mask mods I can find don't have a kitsune (fox) mask. You could ask the person who posted the image where he got it though.
For the first one, guns and crossbows really wouldn't work well with the engine. Without completely changing the ranged animations. Which would make bows look weird. For the second one, I can't help you there.
It's a kitsune mask..I know that much. I'd like that mod too though..I love kitsunes and kitsune masks. If I had one in real life it'd go well with my kunais and shurikens.