Tabletop RPGs focus on combat, and often contain volume after volume of books which explain and expand upon rules, and add optional features as well.
Tabletop RPGs tend to have a medieval-setting, but include classical fantasy monsters such as dragons, and paranormal events such as spells and magic. Most tabletop RPGs are based in Tolkein lore, including the presense of elves, dwarves and hobbits.
Typically, when playing a tabletop RPG, you'll design your character in terms of their race, class and special abilities.
Racial choice (human, elf, gnome, etc.) usually sets the tone for your characters behavior. Dwarves are obnoxious and beer-crazy, elves are haughty and frivilous, and so on. Racial choice also often affects your statistics, such as how much damage you deal, how fast you can move, and so on.
Character class is basically their profession, though it is, again, combat-oriented. You won't see a Farmer class, but you'll often see archetypes such as Warrior, Mage and Theif.
Special abilities are those outside of race and class choice. They are optional abilities which either modify the way your ch...