Hit Die: d6.
Skill Ranks per Level: 2 + Int modifier.
To add some flavor to your commoner, look at Commoner Boons.
The following are the class features of the commoner NPC class.
Weapon and Armor Proficiency: The commoner is proficient with one simple weapon. He is not proficient with any other weapons, nor is he proficient with any type of armor or shield.
Pathfinder RPG Core Rulebook. Copyright 2009, Paizo Publishing, LLC; Author: Jason Bulmahn, based on material by Jonathan Tweet, Monte Cook, and Skip Williams.