I'm not a bastard, so I promise I'm not trolling you. :) So you have three weapon slots in Destiny. They are the Primary, the Special, and the Heavy slots. The Primary slot can be equipped with Hand Cannons, Auto Rifles, Pulse Rifles, and Scout Rifles. The Special slot can be equipped with Shotguns, Snipers, and Fusion Rifles. The Heavy slot can be equipped with Rocket Launchers and Heavy Machine Guns. I think that's every gun, but I could have forgotten one. Typically, I get about ~10-20 Glimmer for killing an enemy in the field. Missions give me more like ~500 Glimmer per Patrol mission. I can't remember what I get from Public Events. The weapons can range anywhere from like 200 Glimmer to like 600 in this build. I think my upgraded Sparrow cost me around 3000 Glimmer? I'm SURE the prices will be changed by the time the game releases in September. I think Bungie just wants us to try out different vehicles and gear. Once you buy your Sparrow at the Tower, you don't have to pay a fee to summon it (thank God). When the Sparrow gets destroyed, you just have to wait on a cool down timer before you can summon it again. Hope this helps!