Out of curiosity I've had a look to see how Toyota's service costs for the Aygo compare to the C1 and 108.
Most manufacturers offer reduced servicing for cars outside the new car warranty - in Toyota's case it is Essential Care for vehicles aged 5 years+, and Peugeot/Citroen offer fixed price servicing for cars aged 3 years+ (Originals using OE parts and Essentials using approved parts).
Toyota fixed price service (available from first service and within the new car warranty period) -