to be honest i never thought about a towbar, never excluded a car because of it.
If you want a Jazz you should go for it, they are easy to drive (clutch is a bit light though) gears are easy, gets great mpg doesnt mind being in 5th gear at 30mph if you are on a long straight road in a town/city. and Ive regularly had friends in the cars, and the car has never suffered too badly, the 0-60 drops about half a second if the car is full (maybe more if you dont hit 5/6k rpm before gear changes i dont know).
To be honest the colour may be offputting, but buy some nice alloys for it and the colour wont bother you...if it still does find a mechanic who does resprays at home and get it resprayed (although remember this costs a fair bit even being done this way, more if done at a garage),
if that idea doesnt appeal to you look around other garages might have them (and dont forget autotrader.co.uk if you dont mind travelling)