Just to clarify one of Harry's earlier comments re toyota's towing in fifth, the new toyota V8 manual gearbox on the 70 series models now have a true 5th gear as part of the box and that can be used for towing at any time. Mind you, we always towed in fifth with both the 60 and 80 series wagons we have owned and no issues at all over hundreds of thousands of kilometres ! My current 76 series v8 wagon gets pretty good economy for such a big heavy square vehicle, down as low as 11 litres per hundred in the Simpson in high range slow revving, but towing I use around 15-18 per hundred in hilly country.
Chris