depends where in europe ... there are mopeds still about. some have pedals, some do not. i know that kinetic, avanti, and derbi still make mopeds w/ pedals. i think puch might also. oh, so does babeta. tomos also makes some w/ pedals ... i'm sure there others. there's always the vespa ciao (the classic moped and longest ever produced model).
i think you could put an oil injection system ... but i wouldn't bother. i like premixing. if the oil injection fails (or you forget to refill it) then your moped is toast.