You should just plug in, and play, assuming you have a TV that accepts the plugs on the cable. If you have an newer 360 with an HDMI out, and a compatible TV then its worth going that way.
No. You can use the red yellow and white cables ( called composite ), or the green red and blue cables ( called component ). Only component and HDMI can use high definition.
No, the HDMI jack on the laptop is output only. You may use it to project your laptop screen on other devices such as monitors and TVs. In order to get other devices to be projected on your laptop...
If It only has Red, Yellow and White it is not HD.
If it has the Blue, Green and a second red aswel as the first three it is HD.
For HDMI you need another cable completely that you can get at any...