Is it a SATA drive? If so, you can just hook everything up and you're good to go. If it's PATA, you'll need an adapter.
I just checked the hard drive for model number, and it said it was MK5055GSX. I searched for it on Newegg and it says that it's a SATA drive: (http://www.newegg.com/Product/Product.aspx?Item=N82E16822149087).
It says 5V for power on it. Do I need any sort of adaptor for the power? My PSU says one of the outputs is 5V@28A, but the SATA connectors don't show a voltage. Will the PSU only give out as much voltage as needed? My PSU is the CMPSU-750TX 750W(http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006).