Stats: 25 point buy. I will not be using the age system, so feel free to make your character as old as the background sees fit.
Races: Core, but I do allow all Paizo racial trait archetypes.
Classes: Core, but I do allow all Paizo class archetypes. I also will allow Unchained Barbarian/Monk/Rogue
Background Skills: 2 per level. Make them fit your character's background and concept. Use these to help flesh out the character.
Favorite Class Options: I will give you two per level, but once they are selected you cannot change them. HP, Skill, or Class options. Pick 2 of the 3.
Feats: I will be giving you Toughness as a free feat along with Leadership. You will get these at 1st level. Your cohort will start off at first level, but will then fall inline with your Leadership score when it comes to their level. They will always be at least 2 levels behind you.
Traits: 2 Traits and 1 Drawback. Use these to help shape your characters background and personality.
HP: Max every level. This is the same for your cohort. If you have an animal companion/familiar they will gain HP as per normal.
Starting Gold: Double your classes starting MAX gold.
Building a Cohort
You may build the cohort using the following rules.
Race/Class: Core only. I do will allow Paizo official race/class archetypes
NPC Heroic Stats: 15, 14, 13, 12, 10, and 8. You place them where you need them. This is BEFORE racial mods. Don't forget to add racial stats.
Gold: 390 Gold. I would use the NPC breakdown that Paizo offers for having your cohort balanced in what they have. Weapons: 100 gp. Armor: 150 gp. Other Adventuring Gear: 140 gp.
Your cohort will get MAX HP at each level.
Your cohort will NOT get traits, favorite class bonuses, or the free feats.
Leveling Your Cohort
Your cohort will start at level one along side you.
Leadership states that they need to be two levels or more lower than you. So depending on your leadership score, the soonest your cohort will hit level 2 is when you hit level 4. Always being at least two levels behind you.