This is just a quick referance list I use with all my servers.
To spawn these into your server use .npc add "Display ID" 1
Class Trainers:
Warrior trainer -- 3169
Warlock -- 988
Shaman Trainer -- 986
Hunter Trainer -- 987
Paladin Trainer -- 928
Rogue Trainer -- 1411
Death Knight Trainer -- 28471
Weapon Trainers:
11868
16621
2704
17005
11870
11869
I do .npc faction 35 to make these useable for both factions.
Profession Trainers:
Enchanting -- 33610
Engineering -- 33611
Herbalism -- 33616
Alchemy -- 33608
Inscription -- 33615
Blacksmithing -- 33609
Mining -- 33617
Jewelcrafting -- 33614
Leatherworking -- 33612
Skinning -- 33618
Tailoring -- 33613
Secondary Skills:
First Aid -- 33621
Cooking -- 33619
Fishing -- 33623
Also here's a cool display for them all too if your're interested:
Display = .modify morph 23411
Thanks!