Children born get the combined numbers of their parents divided by 10.
So Two 2000 Gladiators parents should birth a 400 Gladiator.
Or in the case of Dual Stat Innocents a 2000 Gladiator (ATK) and a 2000 Tutor (INT) should birth a 400 Hard Worker (ATK+INT).
I say should in this case because sometimes the parents will birth a complete unrelated child (in the case of of a Sprinter (ATK+SPD) being born for example which has happened to me)
Also it's generally best to start breeding once you maxed out the Innocent Aid Squad (more so with Raspberyl as the squad member with her one Evility that improves the growth of Innocents in the Farm)
No.
Kill bonus innocents only apply for actual kills.
However what you can do using MT1 at Enemy Strength 1 for example for level 99 enemies
The Minotaurs at level 99 give 491500 each.
So 491,500 for 100% Base + 900% Statisticians = 4,915,000 + 1000% Cheat Shop = 49,150,000
The Boot Camp gets a 35% share bonus at max.
So in this case, the members of the squad WILL share 35% of that 49,150,000 EXP which is still a LOT without doing anything. Also the EXP isn't divided between the Squad.
They get the full 35% of 49,150,000 in this case. 17 Million EXP for just sitting in the Squad is very nice.