These are the hot keys for AOE. Hope this helps your playing skills.
Each age adds the new units because the keys are the same for each age.

RC=Right Click

Basic Commands

Move = RC or M
Stand Ground = D
Repair = RC or R
Attack = RC
Attack Ground (with catapults only) = T

Stone Age Buildings and Units         Training Units

House = BE                            Villager = C
Barracks = BB                         Clubman = T
Granary = BG                          Fishing Boat = F
Storage Pit = BS                      Trading Boat = R
Dock = BD

Tool Age (not including Stone Age)    Training Units

Archery Range = BA                    Swordsman = S
Stable = BL                           Bowman = T
Tower = BT                            Composite Bowman = A
Farm = BF                             Transport = T
Wall = BW                             Gallery = E
Market = BM                           Scout = S
                                      Cavalry = C

Bronze Age (not including Tool Age)   Training Units

Academy = BY                          Chariot Archer = R
Siege Workshop = BK                   Horse = C
Goverment Center = BC                 Elpehant Archer = E
Temple = BP                           Hoplite = T
Town Center = BN                      Priest = T
                                      Catapult = C
                                      Ballista = B
                                      War Elephant = E
                                      Elephant Archer = E

Iron Age

There is only one unit for Iron Age that is not in the rest
Juggernaught = C