Welcome to the forum. I grew up in PA and now live in Colorado. Alot depends on where you are moving, we have friends that live up by Red Feather Lakes, about 9000', but they have an HOA that plows the roads so they don't need chains or high clearance vehicles. I would at a minimum get the best set of mud and snow tires you can afford or get a separate set of studded tires for the winter. Make sure you have a blanket, shovel, flashlight, some food etc in your vehicle, you never know when you will be stuck in snow or on I-70 trying to go skiing and stuck I traffic half the day because of an accident.
Good luck and welcome to Colorado. I hope you enjoy it as much as we have.