Mate it all depends on what day you do.
Aaron McGill runs some good Skid Pan days... they are usually about $100 for half day and 180 for a full day. (half day is more common than the full day ones)
Basically you line up car after car and do the obstacle course time and time again.... they have instructors to jump in the car wth you and then you go and do a few runs by yourself... then more on to the next task.
Ian Luff Motivation also runs a similar day (don't know prices as it was a present), which goes for all day and is two part course.I've only done part one of the course so can't comment on it all. The first part is braking in the wet and manouvering in the wet, second part of the course is more skid control. You'd be so surprised how much you lean on these days.
You don't need any licences (other than your drivers licence), and all you need to bring is your car. But both courses are well worth the time and money.
Hope this helps
Liz.