I just wear track pants and a variety of shirts, depending on temp. I have long running underwear for when its really cold, I have a pair of lined track pants and a lined long sleeve shirt too.
On a typical winter day, I'll wear the lined track pants, lined shirt, a cool max shirt and a sweat shirt over top. When it's around freezing, two thin shirts, regular track pants and a sweat shirt.
When it's really cold, long underwear, lined pants, lined shirt with two other shirts and a polar fleece overcoat.