They get d10, like all martial classes (barbarians, cavaliers, fighters, paladins and rangers). Clerics and druids get a d8 and assassins, acrobats and thieves get a d6.
In terms of HD, they get: drow d6/d8, duergar d6/d8, dwarf d8/d10, elf d6/d8, gnomes d4/d6, halfling d6, half-elf d6/d8, half-orc d6/d8, svinferblin d6.
There is an optional rule to disregard class and level limitations for non-human characters; in that case, humans get some nice bonuses: +1 cha and cos, +1 to morale and loyalty for hirelings and henchmen, roll HPs twice at each level and pick the best roll, act before others in case of tied initiative (+1 to initiative if it is rolled individually).