To get on Xbox live you need to already have broadband. You can get a starter kit off Amazon for about £35 and you get a headset with that as well as some demos. That'll give you one year's membership. After that I think you have to pay around £45 each year you subscribe after that, or you can pay monthly.

I haven't upped any replays yet, still trying to master my Director skills lol. Downloaded a few people's tho and they're pretty good.