I tow a H16 on an oversized galvanized trailer (combined weight about 720 lbs without gear) with my Maza Protege without any problems. The cars you listed here are a bit smaller, but if you check the European specifications for these cars you can get a better idea for the true towing capacity (the US specs will tell you not to tow anything, even for my 2.0 liter Protege5). I looked up the Yaris, and the listed towing capacity for the 87hp model is 550 kg without trailer brakes, so about 1200 lbs.....so you should be fine.