No, you do not need the card; getting Xbox Live online works with it too. But, you do need Xbox Live for you to go online, if that's what you were wondering.
You need an xbox live gold card and either and ethernet cable or a wireless adapter
no, you will not need the wireless adapter infact the new 360 slim has it's very own adapter installed inside the console so there will be no need for a wireless adapter
With the Xbox 360 S, there is a built-in wireless card. For the Xbox 360 (older versions), you need to buy a wireless adapter.
First you need a prepaid card or a credit card/debit card then you will need a High Speed Internet connection (Broadband, DSL, etc.) Then you will need a Microsoft wireless adapter( Not Included) or Ethernet cable (Included in Xbox 360 Pro & Elite not arcade).you need to have a wireless adapter, x box live membership card, and it is your choice if you want a headset, keyboard or non at all.
A wireless networking card to install within your computer, or a USB wireless adapter.
internet a wired adapter (comes with xbox 360) or wireless adapter (I like wireless) electricity
you will want a wireless adapter card if you want to access the internet from your laptop. will only need a router with wireless capabilities in order for you to surf without the hassles of wires.
You need an Xbox wireless adapter.
What it means is it cannot find wireless adapter, make sure that you have turn it on.
Modem.
If you want to use wireless connection yes you need a wireless adapter.
Firstly, make sure you have a wireless router/modem. The Xbox 360 s, the wireless adapter is built in. For the other Xbox's, you need to buy a wireless adapter. After this, you are ready to sign up for Xbox live.