The Brass Era is an American term for the early period of automotive manufacturing, named for the prominent brass fittings used during this time for such things as lights and radiators. It is generally considered to encompass 1896 through 1915, a time when these vehicles were often referred to as horseless carriages.
Here is a cool photo collection of American people with their cars from the 1900s and early 1910s.
A man and five young women in a 1912 Cadillac Model 30 Touring car in Pasadena, CA
Couple in a 1906 Ford, Model N, Roadster
Couple in a 1911 EMF Roadster
Family and a Ford Model T
Family and their 1908 Maxwell-Briscoe Model H in Chicago