Yes you can turn it off. Click "Options" key from the main menu to activate option window. Click the "Video" tab. Click on "Custom", then click on "Advanced" button to open detailed setting options....
No, but the blood isn't that bad in Halo Reach anyway. When you shoot someone who has there energy shield down, a minor blood spill will happen. The blood stays on the ground for a bit before it...
You get climbing gloves by going to the keeper library, and getting the Acolyte upgrade. Then you save up 2000g and go to the store in the docks. You can get them there.P.S. they work AWESOMELY