it looks to be in great shape, but hasnt been fired in many many years. this is my first firearm so i figure getting it straightened out will be good practice before i start building my AR15's. first, how should i clean it? what kind of cleaners and tools will i need? second, what kind of ammo should i get at walmart? i want to stock up with something that i can use in my AR's and GSG5 i want to eventually buy.