Definitely
just play minecraft
no mods dont work
Mods come completed, there is nothing you have to finish to use them.
YOu download them.
You can if you use mods or server texturepacks
Google for Modstallation. You can use that software to install mods.
NOPE
You don't need a CD for mods. You don't need a CD for Minecraft at all.
Yes, you can download and install mods on the PC version of Minecraft, there are several gun mods you can apply.
A good way to get minecraft mods is to use Forge. With Forge, you can download mods of your choice instantly. Just download the Forge client, and you're good to go! :D
You should use forge.
Sorry, but if you are talking about Minecraft Pocket Edition than you can use mods.