You need: the lcd duh. Usually they sell with the inverters. If not you need to get one for the actual screen to show up. Its what powers the backlight in turn that makes the pixels show up so you can see the images.
Touchoverlay if you want a touchscreen setup. Also consider if you want it to be VGA or s-video or rca remember that will depend on what your motherboard can output to. If you can go VGA I would recommend that.