Modloader, Modloader MP, and most Minecraft mods are completely free. You can download most of them at the Minecraft Forum.
Rigusumi's Modloader
Yes. But you need to do this in good way- first instal forge, then modloader. (or modloader-->forge)
Modloader can be found in the modding section of the minecraft forums.
Yes, Forge should be completely compatible with modloader.
You can download all the mods from here aswell as modloader. http://www.minecraftwiki.net/wiki/Mods
no you dont
Modloader is a soon to be obsolete mod that helps solve mod conflicts, helping you install multiple mods at once.
Yes, you can.
its like modloader
yes but you will be lucky to find it
It should already be on when you install it.