The evil classes were included in the 1e Dragonlance Adventures book (i.e. clerics of evil, black robed wizards of high sorcery), but I think the extra races were left out (I don't remember, but at any rate, they weren't really important in the early Dragonlance books).
All the Dragonlance-specific classes (i.e., the tinker, the holy order of the stars, the wizard of high sorcery, and the knight of solamnia) were not in the player's handbook or in the dungeon master's guide.
The holy order of the stars and wizard of high sorcery classes were actually significantly different from the cleric and the magic-user or illusionist; each good/neutral/evil alignment (so there were six classes total) had different spell tables, hit dice, and XP tables, not to mention special abilities (for the priests) and different allowed spells; there were also special rules for maximum level.
(Abridged versions of the rules were included in the manuals that came with the Goldbox Krynn games; of course, the rules for evil characters were left out.)
To make all this possible in DC, we should first probably increase the number of classes editable
