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The first experimental steam powered vehicles were built in the 17th and 18th century, but it was not until after Richard Trevithick had developed the use of high-pressure steam, around 1800, that mobile steam engines became a practical proposition. By the 1850s it was viable to produce them on a commercial basis: steam road vehicles were used for many applications. [https://en.wikipedia.org/wiki/Steam_car]
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Built by the Duryea Motor Wagon Company, which was first demonstrated in Massachusetts, Frank and Charles Duryea founded the company and built a Ladies Phaeton one-cylinder gasoline engine, 4-wheel, open air car. [http://www.automostory.com/first-american-car.htm]
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According to this Popular Science March 1964 article on automotive firsts, "Chrysler introduced ignition-key starting" in 1912 [http://ask.metafilter.com/162908/Origin-of-Car-Keys]
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While Henry Ford is credited with inventing the affordable car, it was Essex that made the enclosed car affordable. In 1928, the big news was the use of four-wheel mechanical brakes. Essex boasted "piano hinge doors" which were exceptionally strong. [https://en.wikipedia.org/wiki/History_of_the_automobile]
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In the 1930's, the firs car with a radio was made
[https://en.wikipedia.org/wiki/Vehicle_audio] -
A Packard car in the 1940's was one of the first to be a color other than black. [https://en.wikipedia.org/wiki/Category:1940s_automobiles]
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These cars were the newest trend in the 50s/60s. [http://www.retrowaste.com/1960s/cars-in-the-1960s/]
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Technology had a big change during this era... a total remodel of the car. [https://en.wikipedia.org/wiki/Category:1970s_automobiles]
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This was the station wagon era. [http://www.ranker.com/list/list-of-all-cars-made-in-1990/reference]
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These cars were made smaller and faster [http://www.autobytel.com/2000/]
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These cars are produced at a much cheaper rate, and sold for more money [https://cars.usnews.com/cars-trucks/rankings/used/2010-affordable-small-cars]
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These future cars are said to fly and zoom across roads, I guess we'll have to wait and see. [http://www.motortrend.com/future-cars/]
