I can't seem to upload mods?

I do all the stuff, and none of it works like I've downloaded the latest forge, and then modloader then Mocraft then it won't let me put it into jar. But I don't seem to have a mod folder, how is that?

The easiest way is to actually just make a new folder and rename it "mods" in the minecraft folder.
To do that first you need to get to the minecraft folder.
Press START and enter in the search bar "%appdata%" without the ".
After that you click on "roaming" and then on ".minecraft".
Once you are in there you just need to make a new folder, you can do that by rightclicking and selecting "new" and then "folder" and just name it "mods" and then drag the mods in there if they are in.rar format. IF they are not in.rar format, and instead are in.jar format, you should just be able to open them and they should go to the mod folder automatically.

IF none of this works, you can always try youtube, there are alot of tutorials out there on how to do/add certain things/mods in minecraft!