Problems with my yaris in winter

[jrenter]

I just wanted to see if anyone else had problems with their Yaris on the snow and ice? I'm from Alberta Canada where we get a fair amount of snow and ice. Right now though the snow has melted and the ice has stuck around! I live in an apartment building and can barely get out of our parking lot safely without my yaris sliding all over the place. Should I put more weight in the trunk to weigh it down a bit? What's the best option? I do have snow tires on my car but even trying to get out my parking lot, I'm doing maybe just above the 10/km hr mark on my speedometer and I can't control the car at all.