Depends. In the UK there were two editions, the second substituted two duplicate cards for new cards in the equipment deck. The North American version had a different setup and the Japanese edition another setup. The Brazilian edition had cardboard instead of plastic for miniatures and furniture (?).
Generally though the components are the same, other than the cards and tiles.
For the EU edition:
Contents
47 finely crafted figures from Citadel Miniatures.
21 doors, with bases.
15 pieces of furniture.
A set of easy-to-learn rules.
Gameboard.
A pad of character sheets to record your progress.
4 character boards with illustrations of the Heroes.
64 full colour playing cards, with spells and weapons.
6 dice: 2 standard dice and 4 specially printed combat dice.
A 32 page Quest book.
A 13-stage Advanced Quest
A full colour screen, behind which the Evil Wizard player plans his moves.
The Cards (from the Inn, with updates):
Quest Treasure
5 Cards in total. ("red book" image)
Includes:
Borin's Armour
Orc's Bane
Spirit Blade
Talisman of Lore
Wand of Recall
NA Edition has a modified card design for all cards, but there are another five "Artifacts" added and Wand of Recall changes to Wand of Magic.
Equipment
14 Cards in total.
Includes:
Battle Axe
Bracers
Broadsword
Chain Mail
Cloak of Protection
Crossbow
Hand Axe
Helmet
Plate Armour
Shield
Shortsword
Spear
Staff
Tool Kit
(Bracers and Cloak in the 2nd edition replace duplicates of Shield and Helmet from the 1st; the NA Edition lacks these cards completely, as all equipment is detailed on the Armory board, a new component not found in the EU editions. the NA Armory also removes Bracers, Cloak, Hand Axe and Spear in favor of Dagger and Longsword). The 2021 Remake Edition is the same as the NA edition in quantities except the Potions from the various expansion book "Alchemist Shops" are turned into equipment cards plus Bracers and Hand Axe are added back in.
Monsters
8 Cards in total.
Includes:
Chaos Warrior
Fimir
Gargoyle
Goblin
Mummy
Orc
Skeleton
Zombie
(As with the rest of the cards, NA has different values for these cards and modified arrangement)
Treasure
25 Cards in total. (Inn page INCORRECTLY lists it as 24, but count them up and see for yourself below)
Includes:
Gem!
Gold! (1 Red Die x10 pieces)
Gold! (10 pieces)
Gold! (20 pieces)
Gold! (25 pieces)
Gold! (25 pieces)
Gold! (50 pieces)
Heroic Brew
Holy Water
Jewels!
Nothing
2x Potion of Healing
Potion of Resilience
Potion of Speed
Potion of Strength
Trap! (hidden arrow)
Trap! (hidden arrow)
Trap! (pit)
Treasure Horde!
5x Wandering Monster
Air Spells
3 Cards in total.
Includes:
Genie
Swift Wind
Tempest
Earth Spells
3 Cards in total.
Includes:
Heal Body
Pass Through Rock
Rock Skin
Fire Spells
3 Cards in total.
Includes:
Ball of Flame
Courage
Fire of Wrath
Water Spells
3 Cards in total.
Includes:
Sleep
Veil of Mist
Water of Healing
1st and 2nd EU edition have some slight changes in the card text (most famously Courage and Rock Skin, could be forgetting some others).
Characters
4 Cards in total.
Includes:
Barbarian
Dwarf
Elf
Wizard
(In the remake edition these are actual cards, one for each hero and also four "rule" (Action/Turn) cards; in the classic version there are four rectangular character boards instead... the NA edition has a different design for more square boards with the rules on the back instead of blank)
A tip.. on the Inn page any section that lists an author's name, those are homebrew cards converted from other editions. For example the "chaos spells" were never in the EU edition originally (alternate versions of the spells and some new ones appeared in the expansions however). Kellar's Keep and Return of the Witch Lord had no extra Artifact Cards in the EU editions. The NA editions of these expansions that came later added small cards that were part of the back cover of the quest books (to either be cut out or photocopied).
https://english.yeoldeinn.com/system.phpAs before the text on the cards and designs vary from region to region. The NA cards are larger in size as well (the Remake cards are Poker size, the biggest of all).