Hey Bubba. Before you "Bubba It", sit your butt down and think. Hmm.. The car won't start, maybe the starter is bad. Hey wait, a corrodded battery terminal.. Hmmm... Would that have anything to do with the car not starting..?.. Well, the battery does connect directly to the starter and then grounds out. Maybe that 120 amps of power that it takes to turn the starter will be able to run across the wires with a corrodded terminal.. Of course it can't. The reason why you can't start your car is because the starter is not getting enough AMPERAGE to turn it over. The starter is one of the easiest circuits on the car.
Battery---Starter---Ground.. Let's see, what could be wrong?.. Corrodded ground cable..

Not to be harsh or anything. Just trying to save the headache. If your car isn't starting and you suspect the starter and the battery has corrodded connections, clean the battery connections. Next check to see if your battery has enough voltage. If there's more than 9.6 volts minus the surface charge, you'll be ok and the car should start. "SHOULD", I'm not done yet. To really tell if the battery is strong enough to turn the starter, you'll need a VAT-40 and test the car's starter draw amperage and see if the battery can put out the more or the same amount of amperage. If you don't know how to do this, go to a shop and ask them to do it for you. Some shops will test your battery for free.. Just make sure that they do a load test on the battery and load it down to 9.6 volts and see how much amperage it has. It should have at least 120amps at 9.6volts. If not, replace your battery. I assume that your starter will draw 150amps at the most. Hope this helps..