I'm sure that you guys could discuss this in a thread so that questions aren't lost in the midst of off-topic conversation
As for the last question: Renown is gained depending on how dangerous/important the mission was, how well they completed it, how many of the objectives they succeeded in completing, various heroic acts, all that sort of thing. It would probably take you about 3-5 missions to move up to the first Renown rank, and start using new/better weapons and ammo.