From Wikipedia (http://en.wikipedia.org/wiki/Warhammer_Fantasy_Battle):
The first edition, written by Bryan Ansell, Richard Halliwell and Rick Priestley was published in 1983 and consists of a boxed set of 3 black and white books illustrated by Tony Ackland: Vol 1: Tabletop Battles, which contains the core rules, turn sequence, creature lists and features an introductory battle 'The Ziggurat of Doom'. Vol 2: Magic which explains rules for wizards of 4 different levels. Higher level wizards have access to more powerful spells. In this system, a wizard picks his spells at the start of the game, must have the correct equipment (usually Amulets), and as he casts each one it depletes a store of 'constitution' points, until at zero points he could cast no more. Vol 3: Characters introduces 'personal characteristics' statistics, rules for roleplaying (including character advancement through experience points and statistic gains, random encounters, equipment costs, and alignment) and has a sample campaign "The Redwake River Valley".
Very little world background is given at all and the race descriptions are kept to a minimum, and most of the background given is in describing the origins of magic items. Some notable differences to later editions are the inclusion of Night Elves (later Dark Elves), the appearance of Red Goblins - and that Citadel Miniatures order codes are given.