You can connect to xbox live using a usb dongle
reabo has a tutorial on it.
http://reabo.co.uk/_tutorials/xbox-live-with-a-dongle.aspx
Be warned though if you connect is slow you will lag while playing
Yes! The only way you can play is with a Broadband connection.
If you mean get it for free using your broadband, you can't! Unlike playstation 3 you have you pay for a subscription (i.e Xbox live) and then connect to your broadband to play. Once you paid for a Xbox live membership, just scan for nearby wifi connections and connect to your router (or anyones if they have no password)
You need a broadband :P
You can no longer play original Xbox games on Xbox Live.
You can play it while signed into xbox live, but you cant play with other people through xbox live on oblivion.
There is no way. PS3 users play on "PlayStation Network". XBox users play on "XBox Live".
No it is not necessary to have a High Definition T.V to play on Xbox Live.
I think you can play if you don't have xbox live but if it does not work mod your xbox 360.
There is no "The Xbox Live", Xbox live is simply a pay-to-play game service where you can play Xbox 360 games online. It depends on the game if you can play it online or not, the game's box should on the back say if it can be played online.
As long as your xbox 360 is connected to the internet and you have xbox live GOLD membership then yes you can play on xbox live with call of duty
you can not because xbox live has stopped supporting the normal xbox not 360
I don't think that you can play an original Xbox game on an Xbox 360 live. But some games from the old xbox you can play on Xbox 360.