Here's a version for dwarves. You'll probably want to change the ages based on your assumptions about dwarven lifespans and how fast they reach maturity. I also added height and weight (because I never know what "tall" means when I am talking about …
I can't answer the question about prompts. However, the easy way to add 10% is to multiply by 1.1. I have not tested this, and I'm still learning IPP myself, but I would think something like:
Set: ST = {{{1d3+8} + [#1 {$Class}Bonus]} * {1 + {{Diffi…