Colors: if the rooster is pure for silver and the hen is gold, chicks will all show silver. Sons will carry gold, but daughters will not. Both sexes may show gold or red leakage in various places as they grow (especially the breast of females and the shoulders/wings of males). All are likely to have "silver" that looks dirty or yellowish, rather than a clean white.
I don't know how much black they will show in most places, but the chicks will almost certainly grow up to have some black in their tail feathers and the big primary feathers of their wings.
For tail size and shape, I don't know for sure, but I think in-between tails are more likely than either extreme.
Edit to add:
I would expect feathered feet on all chicks.
Probably crest on half of chicks, and muff/beard on half of chicks. So you'll get some with both, some with just crest, some just muff/beard, and some neither.
If the hen has a 5th toe on each foot, that should pass to about half of her chicks too.