Boris3 said:
One last warning though, track days can be addicting. If you have a street car soon it seems to make sense to start improving suspension, tires, brakes, adding better seats and seat belts/harnesses, and adding assorted go fast parts, and carefully cutting out your carpet to install a roll bar and 5-6-7 point harnesses and picking up a HANs, and then maybe "adding lightness" by removing some weight...and then maybe you hit the cross roads of getting out for a cheaper hobby or if the jonesing is strong buying a dedicated track car or going full bore gutting and caging your once mild-mannered street car.
In the meantime you will find yourself wandering the paddock when you're not out on track and looking at other folks rides, sitting in their driver's seats "just to try it out", and then maybe you start looking at their open trailers and tow rigs, and looking on Craiglist for cheap tow setups, and then having tow rig envy when wandering the paddock and looking at enclosed trailers and bigger tow rigs.
Perhaps you come to your senses somewhere on this slippery slope by choice, economic necessity or family push back. Or maybe you don't and you start hooking your friends just like other folks hooked you, and hey you know instructing looks interesting, and/or hey rather than this point-to-pass stuff maybe actual racing sounds like a good idea so let's check out Chump, Lemons, WRL, NASA, Council, or SCCA, etc.
Not saying this will happen to you but consider yourself warned. 
I am not sure I know what you mean /s 