hi
i am a complete and utter newb so i have a few questions to anyone willing to help me out.
i`ve got a chance to buy a xbox 360 arcade from the bro-in-law, 20gb hd already flashed and a few games for £50.
i know it`ll play games i can download but what i need to know is:
1. can i use this this like my old xbox, for playing .avi`s . i only use this as a media player.
2. if i can use it , can i up the hard drive with the 160gb already in the xbox1.
3. will the arcade be ok for going on live
4. can the red light thing be sorted if it crops up. i only ask this because i heard so much about the "3 red lights"
5. is this version not high def? if it isn`t is it worth getting? or should i wait and get a better version.

thanks for taking the time to help