Oh yeah, Grivusangel -- the closest you would have seen a woman wearing breeches until the 1900s, was a riding habit, some of which featured a split skirt or what were referred to as Turkish trousers. But then again, women rode sidesaddle, not astride.
Men wore breeches in the 16th and 17th centuries, but usually only peasants wore them and they were leather. The 16th century was one of short doublets and massive codpieces, a'la Henry VIII.
Breeches started coming back into fashion in the early 1700s and were well established by the time the Revolution rolled around.
Here's a fun fact: men's trousers were called "inexpressibles" in the early 1800s because "trousers" or similar referred to the fact that men had legs. "Inexpressibles" was akin to saying his "you-know-whats."