WORK IN PROGRESS. ALL OF THIS IS SUBJECT TO CHANGE
Dwarf
The Dwarves of Doma are numerous, prosperous and varied. Some are quite xenophobic and insular, rarely leaving their stone fortresses. Others are loud, extroverted and quite ready to adventure. All of them are hardy and stout and all the things you come to expect from a dwarf in a fantasy setting.
Elf
Nearly every other race on the planet view elves with suspicion at best and outright hostility at worst. That isn't to say there aren't exceptions, there are dozens. But for a race that once dominated the face of the planet a handful of outstanding members in the eyes of the dominant races on the planet isn't even a drop in the bucket. Add to this the elves seem to be a dying species. They cling in small Houses and city-states around the world, isolated in their need to survive, remembering their sins, and quite dependent on each other for survival.
An elf adventurer will have their work cut out for them as they deal with the inevitability of race relations. A good, skilled elf will be able to earn the respect and eventual trust of Human companions quickly if they're smart and gracious about it. Humans, being so short lived, tend to have shorter memories when it comes to wrongs going back millenia, and in truth a good many of the humans who care enough to have an opinion on the matter consider The Shift punishment enough.
Half-Elf
Elves are extremely rare in the nations of men. Half-Elves are even rarer. Standard stats per Pathfinder rules.
Half-Orc
Half-Orcs are slightly more common than Half-Elves but are still quite rare.
Halfling
Halflings are isolated on their own continent and island chains north of the Dragonspine Mountains. They are uncommon but not unheard of. Standard Pathfinder rules apply.
Human
Duh.