If you have to ask then you need to go to their-- minecraftforge.net/wiki --and read all the information you can.
Forge is a major game mod that will let you use much more in depth mods. If you don't follow the directions of Forge and the mod maker you can screw up the minecraft game to where you will have to reinstall it to get it to work again.
It's not hard to use, you just have to read up on every thing to make it run well with all the mods your gonna want to have.
Minecraft forge is a free program.
First, you google "minecraft forge minecraft forum". And click the first suggestion. Then the first minecraft forum member has posted a minecraft forge link to go to the website.
Minecraft Forge lists you all mods in minecraft and Forge
No, Minecraft Forge is not illegal! That is why many people still use mods.
Minecraft Forge 1.7.2 will not be realeased until early 2014, as it requires many code changes.
As of the newest forge, no.
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
If your taking about minecraft "Forge mod loader" than no. the only thing it does is let you install mods quickly and efficiently.
Forge Modloader is how the mods are loaded into the folders of Minecraft, as you can tell in the name. Why can you not use forge?
Yes, Forge should be completely compatible with modloader.
If you've created a new profile for Forge, all you need to do is change to your username in the dropdown list.
MC Forge will always use its latest version. Therefore, backup your Minecraft and install your second Forge. Forge will use its latest version.