No. If the Empire army was to be able to take these characters, they should be described in the Warhammer Armies - Empire. The Chaos Army book specifically describes the Minotaur lords, and Beastman champions allowed for Chaos Armies.
House Rule: It is suggested that the Empire player be allowed to field Ogre characters as they are described in the Battle Beastiary. The Empire Army would only be allowed to field Ogre characters if it had a unit of ogres. The point cost for these characters is:
Ogre: 40 Points
Ogre Champion: 110 Points
Ogre Chieftain: 240 Points
Ogre War Chief: 380 Points
The point costs for the ogre characters is the same as a Minotaur character, and is the same as the value published in the Citadel Journal.
No. If the Empire army was to be able to take these characters, they should be described in the Warhammer Armies - Empire.
House Rule: It is suggested that the Empire player be allowed to field Halfling characters as they are described in the Battle Beastiary. The Empire Army would only be allowed to field Halfling Characters if it had a unit of Halflings. The point cost for these characters is:
Halfling: 4.5 Points
Halfling Champion: 27 Points
Halfling Hero: 58.5 Points
Halfling Lord: 90 Points
The point cost for halfling characters is based upon the point cost calculator from earlier versions of Warhammer Fantasy Battle.
Only state troops regiments may have detachments, and the detached unit must also be a state troop regiment. The following units are state troop regiments: Spearmen, Swordsmen, Halberdmen, Greatswords, Crossbowmen, Handgunners, Archers
A unit may have up to 1-2 detachment units.
The total number of figures in the detached unit must be equal to or less than one half the number of figures in the main unit.
Detached units may not have champions or standards, other characters may join the detached unit.
Detached units get to use the leadership values of the main unit.
The Warhammer Armies - Empire specifically states which units are state troops, and the Reiksguard Foot Knights, Dwarfs, and Halflings are not included in this list. Therefore, the Reiksguard Foot Knights, dwarves and halflings cannot have detached units, nor be detached units.
Since the pistoliers have 2 guns, it is assumed that 1 is always loaded and can be used to stand and shoot, shoot in the missile phase, or shoot in hand to hand combat. Note that the pistol shot attack uses the pistoliers BS instead of WS to determine hits.