Erm, did I miss something here? You have no car, and some kind soul is offering a quite new one for free, and you're turning your nose up at it because it's a four wheel drive?!
If I had no car, needed one and was offered a free anything - even a 20 year old Sierra that smokes so much you can't see what's behind you - I'd say 'That's very kind of you, thanks very much' and drive it away! Particularly in light of the way you make it sound like you'd be doing them a favour by accepting?? Don't take that wrong btw, but a fairly new anything - 4wd or not - is far less polluting than an older vehicle, say pre 1992 with no catalytic converter (if that is your objection to them). The whole 'Greenie' thing of spitting on 4wd cars and pulling their wipers off etc is misguided to say the least.
That aside, I'm not a big fan of four wheel drives but they serve a purpose if you live in a rural area - and then you need a proper one ie a Land Rover. The X5's, Cayennes, Touaregs etc really aren't for off-roading, they're for image as others have pointed out.
