1 to 300 Engineering Guide
Credit Elzix, Cho'gall-US

Approximate material list:

Rough Stone x 90
Coarse Stone x 80
Heavy Stone x 75
Solid Stone x 96
Dense Stone x 50
Wooden Stock x 10
Weak Flux x 29
Heavy Leather x 50
Wool Cloth x 10
Mageweave Cloth x 10
Runecloth x 33
Copper Bar x 52
Silver Bar x 10
Bronze Bar x 55
Iron Bar x 19
Coal x 4
Steel Bar x 4
Mithril Bar x 126
Thorium Bar x 159

Vendor Patterns Needed:

Schematic: Green / Red / Blue Rocket Cluster - Reward from Cluster Rockets Quest at Lunar Festival ( http://www.thottbot.com/q8880 )
Schematic: Thorium Widget - Engineering Supplier in Orgrimmar / Ironforge.
Schematic: Thorium Tube - Engineering Supplies in Everlook, Winterspring.
The rest of the Schematics come from the Engineering Trainer.

Level Item Materials
1 to 40 90 x Rough Blasting Powder 90 x Rough Stone
41 to 50 10 x Handful of Copper Bolts (Save All) 10 x Copper Bar
51 to 51 1 x Arclight Spanner 6 x Copper Bar
52 to 65 18 x Copper Tube (Save 10) 36 x Copper Bar, 18 x Weak Flux
66 to 75 10 x Rough Boomstick 10 x Copper Tube, 10 x Handleful of Copper Bolts, 10 x Wooden Stock
76 to 95 80 x Coarse Blasting Powder (save 20) 80 x Coarse Stone
96 to 105 10 x Silver Contact (Makes 50 contacts, keep 10) 10 x Silver Bar
106 to 120 15 x Bronze Tubes 30 x Bronze Bar, 15 x Weak Flux
121 to 125 5 x Small Bronze Bombs 20 x Coarse Blasting Powder, 10 x Bronze Bar, 5 x Silver Contact, 5 x Wool Cloth
126 to 145 75 x Heavy Blasting Powder (Save All) 75 x Heavy Stone
146 to 150 5 x Big Bronze Bombs 10 x Heavy Blasting Powder, 15 x Bronze Bar, 5 x Silver Contact
151 to 175 50 x Red/Blue/Green Firework 50 x Heavy Blasting Powder, 50 x Heavy Leather
176 to 176 1 x Gyro-Chromatic Micro-Adjustor 4 x Steel Bar
177 to 190 46 x Solid Blasting Powder (Save All) 92 x Solid Stone
191 to 195 5 x Big Iron Bomb 15 x Iron Bar, 15 x Heavy Blasting Powder, 5 x Silver Contact
196 to 205 10 x Mithril Tube 30 x Mithril Bar
206 to 210 10 x Unstable Trigger (Save All) 10 x Mithril Bar, 10 x Mageweave Cloth, 10 x Solid Blasting Powder
211 to 225 15 x Hi-Impact Slugs 15 x Mithril Bar, 15 x Solid Blasting Powder
226 to 235 20 x Mithril Casing (Save All) 60 x Mithril Bar
236 to 245 10 x Hi-Explosive Bomb 20 x Mithril Casing, 20 x Solid Blasting Powder
246 to 250 8 x Mithril Gyro-Shot 16 x Mithril Bar, 16 x Solid Blasting Powder
251 to 260 50 x Dense Blasting Powder 100 x Dense Stone
261 to 290 33 x Thorium Widget 99 x Thorium Bar, 33 x Runecloth
291 to 300 10 x Thorium Tube 60 x Thorium Bar