I am interested in cutting my car's running costs. At the moment I have a 2002 Ford Focus 1.6 petrol, which isn't great on fuel and is expensive to tax. The boot is also on the small side.

I am interested in the Toyota Prius (2005-2006 plate) because of the much cheaper tax and better fuel economy and bigger boot. However, the cars in my price range all have 100.000 plus miles and I am slightly worried about the complexity of the drivetrain. Would you recommend it as a good option or is there a possible alternative?