When you start at goodsprings go to the general store they'll have some guns. Also if you follow the quests someone will give you a gun and some ammo. Oh and don't forget to look for some traveling merchants.
ammo and not vary good guns
You can find the full list at the related link given below.
No, swords are weapons that don't run out of ammo like guns. Guns run out of ammo, not swords. Swords have infinite ammo. Their infinite ammo is their blade, not bullets. Guns run out of ammo and have to be reloaded. Some how, swords are better than guns because swords can deflect bullets. Guns uses bullets and swords uses blades.
On the mother ship zeta expansion pack, if you don't have that you can't get them, besides one alien blaster with limited ammo at a UFO crash site
You cannot get a silencer for the assault carbine in Fallout New Vegas I'm afraid, the only guns you can get silencers for in New Vegas are the sniper rifle, the varmint rifle, 12.7mm pistol and machine gun.
You can't now. You have to leave the bosses alive and talk to them about buying guns from Mick & Ralph's again.
Unless there's a mod where guns use the same ammo, none
This depends on the type of gun, the Gatling Laser is very powerful and so are the Rocket Launcher and Plasma Rifle, however these are all different types of guns.
No guns or ammo
The most popular magazine featuring guns and ammunition is "Guns and Ammo." Other popular gun and ammunition magazines include "Handguns" and "Shotgun News."
yes
yes