Your laptop will need a Wireless Network Interface Card (NIC) and you'll also need a wireless ADSL router and a wireless Print Server. I recommend that you get the 802.11g 54mbps standard.
I recommend the following products:
Wireless NIC - Netgear WG511 or Belkin (F5D7010uk) 802.11g Wireless Notebook Network Card
Wireless Router - Netgear WGR614 or Belkin (F5D7630uk4A) ADSL Modem With Built-In 11g Wireless Router
Wireless Print Server - Belkin (F1UP0001uk) Wireless Print Server
I recommend the Belkin ADSL Router and it is cheaper to buy from Savastore click here or EBuyer click here