Now is the time to embrace your neighborhood thrift store. Look for wool dress pants in various weights. Use a nylon shell over that like warmup pants. I stuck my head in our local one and found 11 pairs in a fairly heavy weight.
A light wool sweater [shetland or merino not cashmere, which isn't wool]can be had for five bucks, but 2 thin ones and layer them. A windbreaker over that helps. It's also ski swap season, go for gloves and hats, surplus stores for wool liners,watch caps, and balaclavas. I have a wool scarf [in lovely olive drab]that I suprisingly really use a lot.
There is a lot of stuff online;
Land's End has a 700 fill down jacket or a down parka for 100 bucks, winter boots in 600 gram insulation. Sierra Trading Post has 44 different down products and 117 wool sweaters. Campmor always has something blown out in their hot deals. Steep and Cheap is another place to score top name stuff.
Search these forums, learn about VBL, when fleece works, when it doesn't, how to stay dry, keep from overheating,get outside when it turns nasty near home, take notes about what worked,what needs improving.
Why did your feet get cold; convection, wet, o lack of insulation? Was your head covered?
The motto above my grandfather's door was many are cold/ few are frozen.
Good Luck, keep asking questions.