Minecraft Mods [Help]

I'm new to Minecraft Mods i never tryed it and i need some help i also have a cracked version of minecraft since it wont let me download it from minecraft .net
because it says "cannot connect to minecraft" or something.
So i got a cracked version and i dont know how to mod it.. and i dont think i could find a Minecraft.jar.

Minecraft.jar should be created in the bin folder after first launch.

Go to run, type in %appdata%, then go. Locate .minecraft, then inside, the bin folder.

Not matter which version you are using. the minecraft folder is located in the same folder in %appdata%.