The Bakemono card should read: During the Ki Phase, the controlling player may elect to put a Bakemono's Ki on the Bakemono card instead of its own.
Q: Are the Feats listed on the Bakemono Horde card Free actions, it does not specifically state either way?
A: Yes, the Feats are Free/active actions so do not tire your Bakemono models.
Q; Whispers from the Darkness doesnt specify the value of the models Cowardly trait what should it be?
A: Should the model fail the Target (X) test it gains the Cowardly Trait equal to (X). Which is the number Ki markers spent for the test
Q; Can i summon a Bakemono into BtB with an enemy model a bakemono is already in BtB with.
A: No, you cannot Summon Bakemono into BtB with enemy models.