One or two layers of loose fitting but warm pants will suffice, depending on how cold it is. Track pants are ideal, with thermals underneath on really cold days. Jeans are not a good idea, unless they're lightweight and loose for mobility. A turtleneck is a good bottom layer. Polar fleece is a great insulator, as is wool.
Screamer also makes a more fun, if less functional, line of headgear.
Wind and water resistance is a must. GORE-TEX is a fabric of choice for those seeking guarenteed dryness. Columbia , Spyder and Schoffel are a few of the manufacturers now online. Snowboarders will, of course, want to check out the Burton page on the net. About your height is just about right.