If your bielefelder cockerel is pure for barring, so will all of his offspring with a barred hen. Males will be double-barred, females single-.
As females can only pass chocolate to her sons, her daughters will all be black. This is also the case for the male offspring, who will need two copies of the gene in order for its expression. Leakage will express as in the reverse cross, however as we see the cockerel is gold based, all his daughters will be too. If the hen is silver based, and I imagine this is the case for a good cuckoo bird, she will pass silver to her sons, who will be S/s+, silver/gold. Red sex-links, though it will be hard to tell in the chick down.
White skin/legs are dominant over yellow. Neither parent breed ought to have leg feathering, I believe, though I'm not terribly familiar with Bielefelder, past the autosexing aspects.