If you open the Network Connections folder and there is an entry for "Wireless Network Connection", then the laptop is wireless enabled. The wireless adapter should also appear in Device Manager.
<<< My friends say their wireless laptop picks up a signal from their neighbours' broadband and connects them that way? If this is possible how do I do this? >>>
While it may be possible, it isn't legal to "piggyback" someone else's broadband connection unless you have agreed with them to do this. If they are agreeable, your wireless software should find "Available Networks" to which you can connect, you highlight the relevant one and click "Connect". If the network has been encrypted, which it should have been for security, you need to enter the key in order to connect.