purchase advice to the smart 450

hello your dear smart driver =) had until recently a mazda rx-8 with 231 ps. the sporschlitten swallowed well and liked 17 liters super! these times should be over now and I want to get a smart for two from the year of construction 2003. have me now really good in the topic but have still the one or other question. 1.Did the 698 ccm engines also have a turbocharger? 2.I read again and again : if ́s a already 450s must be, then at least the 698 ccm engine because the 599s tend to motor damage faster. so far as well, don ́t want to do without esp anyway, therefore only the engine comes into question. however up to what run performance I can buy a stacked car, if it still should run at least 30 000 km without engine or gear damage? ( yes, I know, no very high claim – because I will study the next years, would be a half-character in this case, but I ́m sure not interested in the usual way.