First of all, see if your starter is good, and that you at least have a good solonoid. If your solonoid is mounted on the starter try sticking a screwdriver, wrench or anything metalic to jump the connection between the wire that should go to your ignition switch and the terminal that the battery cable goes to. If you just get a click and the engine doesn't even attempt to turn over then that means you have a bad solonoid, and replace it. You might as well go and replace your whole starter but if you're cheap like me just replace the solonoid.
Just depending on your current situation with your scout you might want to install a new ignition switch, ignition and starter wires, and a new starter with a new solonoid.
This is exactly what I had to do with my truck to get it going again, except I only had to replace the solonoid.