as you are heading out so soon, perhaps my advice will be useless. Perhaps it is anyway.
1) If you live near a Kitchen store...Kitchen Kapers, Gourmet CHef, Kitchen Connection, etc...give a visit and ask lots of questions, handle several pieces. If not go one line to Fantes and check out their cookware guide. Fante's Kitchen Wares Shop - Fantes.com
unless you are sure, don't buy a set but a useful piece here and there.
a good sized pot for soup and stew
a sauce pan
a fry pan
a saute pan
make sure they are thick heavy metal unless you physically can't lift them, then go for something a bit lighter, but...heavy walled pans cook more evenly, are more forgiving. THin pans burn.
you may want some teflon...a fry pan for eggs for example.
If you like shopping...look at places like Marshalls Home Goods for fine pans at 1/2 price, or many on line places. You can get many pieces of Calphalon at Amazon.com for very low prices.
There is no one hard and fast answer...you cook a certain way and your collection of pans etc need to fit you adn your needs so it is often a collection you build rather than a set you buy today.
enjoy the whole experience.