In the Winter I just wear a pair of Fila ski pants over my blue jeans and I wear a First Gear Kilimanjaro jacket over a long sleeve T shirt when riding to work or just running errands. When it gets really cold, below zero, I have a pair of Reima ski bibs that I wear instead of the Fila bibs, the Reima bibs are too warm and I will sweat if it is above zero Farenheit.
For a helmet I use a Ski Doo BV2S snowmobile helmet without the electric visor. The best cold weather helmet I have ever worn.
I have several pairs of warm gloves but the best seem to be a pair of Ski Doo snowmobile gloves.
If I am going for a long ride, over 100 miles, I will usually put on a pair of long underwear and carry a couple of pairs of gloves with the hand warmers in a spare pair in the sidecar to keep them warm so all I have to do is switch gloves and they are pre warmed. http://www.warmers.com/grabber-hand-warmers-1/