any wireless guru's out there?????

Can anyone help, I tried to get a phone connection for my computer put into an office in my new home - solid walls prevent this except via a conduit down the wall!!!! Yuk!!!

So wireless will have to be the go, can you tell me what I need to service an ADSL connection and perhaps approximate costs?

Much appreciate the help - as you can tell I am not a big techie type!!

Cheers

Cabe