2003 Toyota Prius Sales Brochure. Cleaner Air. Cleaner Conscience. Some cars claim to stir your soul, but can one actually redeem it? The 2003 Toyota Prius can. How, you ask? Well, it starts with the Toyota Hybrid System, an ingenious marriage of a gas engine and an electric motor. Part gas. Part electric. Fully loaded. Includes colors, standard features, safety features, accessories and specifications.