I am thinking of getting mods like Tale of Kingdoms and the Planes mod, but I am afraid they will conflict with EMC. Is there a way I can have mods on a singleplayer world, yet an unmodded EMC?
I also need help installing mods. I can't find my .jar file, and it says 7-Zip is not compatible with Windows 8.
Installing "Minecraft Forge" helps mods cooperate. That's what makes all of the mods in tekkit, FTB, ect. working together properly. (this is only an answer to the first question)