There is no normal really for me. One job may be pretty much as in camera, another may take hours of PP, removing things, burning/dodging, replacing skys etc etc. It's all down to what you can get.
A wedding for example, will have a minimum first edit, thats just for viewing, then a second edit for album (the chosen images) this is a lot more in depth, cloning marks on floor etc, taking things out of the background. A lot depends on who does the shoot and the venue, plus the effects ones, the sepia or spot colour (people do still like them) sometimes we'll get asked to take somone out of the group shots, just about anything really. Wayne