there is to ways to answer this
cause u said HD this could be looked as Hd: high definition or
hard drive
so i will answer both ways
the xbox doesnt need high definition although it is recommended you can still play in standard definition just that the picture on the screen wont be high resolution but will still look just right you wont see a lot of things such as refection or small details for characters.
if your talking about hard drive then the xbox will defiantly need one if you don't have one then you will have a hard time using your Xbox but you can still use USBs but there best to use for back up saves for your games
no
no
An Xbox 360 is capable of playing HD movies as long as you have an "Xbox 360 HD player." The Xbox 360 itself can be viewed and played in the HD content. You will need some HD equipment which includes a HD TV (some will say HD ready - meaning 720p, others will say full HD - meaning 1080p). After getting a TV, use a HDMI cable to link your xbox to the TV. This will now show you HD. Any video game can be viewed at the full 1080p HD.
no, the 360 elite come with standard definition cable if you want to play in HD then you will need an HDMI cable for the xbox and a HD tv unless you using a standard cable
Yes, it will. To get the HD quality you will need component cables.
Yes it would because, the higher graphics it is, the higher Gigs it will need on the Xbox.
In order to get High Definition gaming You need an HDMI cable and a HDTV/ HD Computer monitor.
you have to buy the HD cables, but yes.
Yes
on the xbox 360 its at the back of the xbox 360. there is a hdmi port put the hdmi cable in the xbox 360 and slot it in the hdmi port on your hdtv
no
they usually are in fact if its the new xbox its based on a standard and HDTV setting, all you need to do is change the tv settings for your xbox, its as easy as pi.