I also am from the northeast Ohio region, infact we tend to get a lot more snow normally they you do I Cleveland.

My first advice is to stay on the moutain bike for now except on the really nice warm days when there is no snow or ice. So basically we are talking days that are around 35 degrees or higher. If it has snowed recently and has not been significantly above freezing for a few days after a snow don't use the road bike you will need the tires of the moutain bike or cross tires(traction is a must where we live).

I use the same layers on my road bike and moutain bike, except for my feet. On the road I use my road shoes with a pair of regular socks and cover it all with neoprene booties. Caution with the booties they keep your feet so warm they will sweat, then can get cold. On the mountain bike I use regular pedals with a pair of hiking boots, which can hold one or two layers of wool socks in them. Wool will keep the feet quite warm.

Hands depends on the temp. 30-50 I use thinsulate ski gloves with the liners from my lobster mits in them. Below 30 I have to use the lobster mitts. (they are like mittens except they have three finger compartments)

Head I use a simple balaclava and my helment. A must if you ride in really cold or in cold windy conditions is a pair of goggles. The help keep the parts of your face not covered by the balaclava warm, and keep the cold wind out of your eyes. (I had a problem with my eyes draining because of the cold one day, sunny but only 25.) Note be sure the googles are anti fog.

Lower body I usually use on days above 32 a pair of winter weight tights and my summer shorts. Below I add a pair of summer weight tights for more layers.
If I ride below 0 I will have a pair of snow pants on as well.

Upper body I wear a moisture wicking layer, a jersey, and my Under Armor cold gear mock turtle neck, topping it off with my outer shell from my Columia winter coat. Occasionally I put on a second lighter weight mock as well.

Ok, I know thats a lot but that is just me.