First, a router is just a rotory tool. It's a powerful motor with a spinning bit, like a drill. Goto
www.craftman.com and search for router.
There are different bits. There are bits to make grooves, like dovetail grooves to interlock sections of wood. There are carving bits, that do nothing but route wood way, like for the joysticks. It's a bit, you set the depth of the bit and it will chip out the wood to that depth.
You can use a router to make straight lines if you have a straightedge to guide the router. My dad has one for his router, made making my cabient much easier. I also have a dremel which is a low powered handheld router. Goto
www.dremel.com. I just used that to round corners and such. It's not powerful enough to route out large areas or do alot of cutting. If you look at my cabinet I no tmolding. I just rounded the edges of the cabinet.
i like the pic JM posted, but as mentioned that's freehand router. Because it spinns at some hefty torque it is hard to pull it straight on your own. I made perfect squares using a straightedge to guide the router.
BTW, MDF is perfect for someone who hasn;t done much woodworking. It's essentially a board madde from very fine sawdust and glue. kinda like plywood, but even finer material. It makes it really easy to cut. because it is fine material it is more dense than plywood therefore heavier. It's pretty strong too. There is jsut some don't, like plywood, that you don't do. one, don't screw into the ends, it will split the wood. second, it will soak up water. So at least two coats of primer are needed to seal it so humidity isn't a large factor.