Goblins: Interrogating goblins by torture seems to be creepily prevalent in D&D games. Anyway, it’s not necessary, because goblins will always tell you everything when threatened with torture, no Intimidate check necessary. They’ll mix in 20% malicious lies, but they’d do that under torture as well.
Hobgoblins: Hobs will inform you of their name, rank, and serial number, and then try to escape or commit suicide as soon as possible. They can withstand torture very well, but they will enthusiastically betray their superiors if you convince them that their efforts are unappreciated.
Bugbears: Bugbears are vicious, unfeeling brutes. By “unfeeling” I mean “they don’t have pain receptors.” However, they are easily bribed.
Orcs: If you try to torture orcs, or even tie them up, they will get so mad that the pulsing vein in their forehead will burst and they will die.
Gnolls: Stressed gnolls undergo frenzied visions of following Yeenoghu and ripping people limb from limb. In this state, they slaver foam, snap their teeth, and giggle curses. They don’t give information.
Elves: Elves enter a trance state much like the gnolls do, except theirs involve dancing in magical glades instead of running down panicked humans. Instead of slavering foam, they murmur, “More tea?” and “Sindural shall play the aulos while Mistral distributes the mystic crumb cakes.” But elves will tell you anything during pillow talk.
Half elves: Half elves never have secrets worth knowing.
Dwarves: Dwarves have high pain tolerance and unending reservoirs of stubbornness and hatred. However, they love beautiful things. Instead of torturing them physically, make them watch as you hit a dwarf-made ewer with a hammer.
Halflings: Torture is unnecessary to get information out of halflings. Just engage them in friendly small talk. They will accidentally reveal 1d4 secrets per hour, from closely-guarded pie recipes to secret tunnels into the castle.
Humans: Torture might work on humans, but you probably shouldn’t do it. Because torture is evil.