How can I reboot my computer with a used hardrive?

How can I reboot my computer with a used hardrive, I have a Restore CD for my emachine T4130, it has 2 CD's, do I use that? What if nothing happens? the hardrive came from a act personal computer, and put it in my emachine computer. On the screen it says Select proper boot device. Boot media in selected Boot device, Where do I go from here? Or is there another CD I should be looking for or getting?