The 2015 Toyota Prius c is available as a 5-door, 5-seat hatchback. Starting at $19,540, the 2015 Toyota Prius c One is powered by a 1.5L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 53-mpg in the city and 46-mpg on the highway. The top of the line 2015ToyotaPrius cFour , priced at $ 24,475 , is powered by a 1.5L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 53-mpg in the city and 46-mpg on the highway.