By wireless broadband I presume you mean the router to which your line is attahced to allowing you to connect to the internet.
If so yes you will need sometype of adapter for you laptop/PC so you can access the internet.
If you have a laptop you can buy a adapter if it is not already configured with an inter adapter to receive wireless. You can also buy an apter for you PC.
It sounds like you have a box of tricks which you cannot yet use. I would ahve thought that Orange should have supplied an adapter.