I have an answer for the dwarf part. Anything a dwarf breeds with will always come out a dwarf. Thats how it was in 2nd addition. So unless they changed it, a dwarves always make dwarves.
Fair enough.
Oddly enough...
From the 2nd edition FR Accessory
Dwarves Deep:
Halfbloods
Humans, gnomes, and halflings are
cross-fertile with dwarves. Elminster says
elves and dwarves can have issue as well.
Common in Ardeep, Eaerlann, and Myth
Drannor of old, this is unheard-of today.
Mates who respect dwarven customs
and traditions are honored for their cour-
age (in entering a strange society), loyalty
(to the customs of dwarves) and aid (in
preserving the Folk).
Half-dwarves are not a distinct race.
Save for their height (a head taller than
most dwarves) all offspring of unions be-
tween dwarves and other races look and
act (and are treated in the rules) as pure-
blood dwarves. Dwarven halfbreeds al-
ways have the stocky build and hirsute
appearance of purebloods.
If halfbloods mate with pureblood
dwarves, the offspring will be a pure-
blood. If halfbloods mate with another
halfblood or a nondwarf, the offspring
will be a halfblood.
Hmmm, makes for some entertaining dwarven insults.