I've always wanted to get into track days, but the idea of binning my Celica horrifies me! Plus if I did ditch it i'd then be stuck without a car. I've only done 4 laps of the Nurburgring which was fantastic fun, but I was so relieved after finishing that I had a car still in one piece, especially given the reputation of that circuit!
Something which may be worth considering and I've looked into (but never actually gone through with) is a novice only track day. You're put with everyone of the same skill and have a bit of extra instruction, plus they're quite cheap as usually under £100 for the day.
http://www.clubmsv.com/car-home/novice-only.aspx
You can also do taster sessions at some tracks - 20 minutes of track time for £25.
http://www.clubmsv.com/car-home/taster-sessions.aspx
Remember track day insurance! Its not too expensive (I think I paid £90 for a full day at the 'ring) but only covers your car and not any third party cars or infrastructure you crash into (nearly impossible to get insurance for this.) I believe the un-written rule of track days is that you're responsible for any damage to your car, no matter who or what may have caused it.