Hey guys, can i get the blades armour without doing the MQ?

I don't see why not? If you know where to go to get it. I don't think there is any special key you are supposed to get from an NPC.

No, not without some console cheats. I simply disabled the "door" that is blocking the entrance through the console, you can't open the temple before the main quest. You usually need to spill your blood in that thingy before the temple, you can't activate it if you're not on that part of the quest.

Alternately, there are several mods out there that allow you to craft the Blades armour.

I'm not sure, I know you can get their Katanas without doing the MQ.