1. Yes
2. Color is "whiteness". So the color is different.
3. Yes
4. You don't want HID fogs. If you did, you'd have to get whole new assemblies.
5. Running lights are the bright lights. Not regular. Keep the regular lights for brights, and just get HID for the regular.
Keep in mind, the plug MIGHT be backwards on the ballast. Check the positive and negative before you install them.
Good luck!