Before you go car shopping, do your homework. Know what you want and how you plan to pay for it. Then put on your happy shoes and go shopping!From auto dealers to auto brokers to the Web, here's what you'll need to know to track down the best vehicle at the best price.You know your budget and did your shopping. Now it's time to bargain with the seller.Leasing a vehicle makes sound financial sense in certain situations and for certain people. For others it's a money trap.Get a grip on the financing process as we help you shop for a loan and spell out many key questions you should ask before signing on the dotted line.Buying a new car, or a substantially different one than what you now own, will mean a change in your insurance costs.