After you've visited the local police station Mia will appear. She will help you with acquiring a new car, so you'll be able to get back to the Black List and ultimately defeat Razor. You will be transported into one of the local car shops. You can choose between three different cars. There's also a Volkswagen Golf, but I assume that you don't have any savegames from the "NFS: Underground 2", so you won't be awarded with extra cash.
Lexus IS 300 (#1) handles very well and it's quite stable at the corners. Nevertheless, I wouldn't recommend buying it, because it's a lot slower than the Fiat Punto and Chevy Cobalt SS. You can notice the differences by looking at the Acceleration bar. As a result, you'd have a lot of problems winning the following races in a Lexus, and I'm not even talking about taking down the first guy from the Black List. You should also remember that most of the mechanical parts are unavailable at the moment, so you won't be able to do anything, even if you'd have enough cash.
Fiat Punto (#2) is not that quick, although it's a better choice than the Lexus. The vehicle handles very well, even without the additional parts. It also accelerates nicely, so you shouldn't have any problems leaving rest of the pack behind. It's the best choice for less experienced drivers. Punto shows its strongest points during the races with a lot of difficult corners. On the other hand, you may encounter some problems with those tracks which include a fair number of straight sections.
Chevrolet Cobalt SS (#3) is by far the most interesting car of the presented trio. If you take look at the performance bars you'll probably notice that it shouldn't handle very well. That's not true. You won't have any problems with it, even without any mechanical parts. Chevrolet is much faster than Fiat and Lexus, it also accelerates very well. Furthermore, Cobalt SS is cheaper than the Fiat, so you will be able to save up some money for later. As a result, this is a car you should be interested in, although you shouldn't get attached to it, because you have to sell it after defeating the driver from the Black List.
You should appear on the area map. You will be able to explore the first district without any problems (#4). First of all, you will have to reach the current hideout. You might press the M key in order to bring up the map of the area. Use the GPS in order to help yourself to get to your current destination. An arrow will appear on your screen. It will show you the right way.