I am determined to get a bike, because I would hate walking 1 to 2 miles to get to work, or futher but I need a mountain bike which is comfortable.. Also in the snow I would hate riding in the snow but I dont think any bicycle would be suitable for the snow!
So, my concern in, what kind of bicycle should I get? A mountain bike, or something else?
I was thinking about a pacific brand but they are the worse for the money!
A mountain bike. That said, get one with a light frame; if you're not actually going off road, you don't need a particularly sturdy bike, and the lighter, the better, and to a point, the cheaper (until you start getting into light weight as a specified feature, then they start charging more for the reduction and materials required to get there).
If you can afford it, two sets of tires: smooth street tires and grippy winter tires. If you can't afford two sets, outfit yourself for snow. When you need the extra grip, you really need it... when you don't, it will make the cycling a little more difficult, but otherwise it won't be an issue.
I would go mountain bike as well... To find a cheap one I would suggest looking on criagslist.com
I've had several cheap bikes and they have all served me well. I do have an expensive road bike but don't really get to ride that much. Too expensive to just take around to class and all if you ask me.