Ok i havent played WoW in a while but im pretty sure you need to be a tailor or you need to buy the dye and right click it then the piece of clothing you want too dye
You can craft things with Lapis like: A Lapis Lazuli block, light blue dye, cyan dye, purple dye, magenta dye and blue wool. You can check out Minecraft Wiki for some help and tips.
Dye is most commonly used to colour capes, but they are also used in several quests.
rose red dye and bonemeal
no
For colouring wool blocks.
No, but you can dye it's collar
Burn cactus in a furnace.
You can't. But with resource packs or mods you can.
You cant unfortunately but there maybe a mod out there.
You can dye wool or sheep black with it.
Burn cactus in a furnace.
Orange dye can be made by putting yellow dye (from crafting yellow flowers) and red dye (from crafting red flowers) on the crafting table.