I have a Ford Mondeo 2.0TDci Titanium Estate and a Toyota Avensis 2.2Tr Estate on our fleet - both 11 platers, both have seats that fold flat, the Toyota doesn't require the seat squab to be lifted but the Mondeo does. Capacity wise the Mondeo just has the edge, but the Avensis has lots of under floor storage in the boot for the usual clutter one carries - but at least it's hidden away and doesn't have to be removed before loading.
Economy wise the Mondeo returns a regular 48 mpg, the Avensis only 40mpg - neither car is driven as economically as they could be ( service engineers on call!)
Either car is a competent hauler, my recommendation would be for the Toyota as Tugnut suggested - I reckon it drives better, feeling a lot lighter than the Mondeo (actually quicker too) but not quite as frugal.