You could always try to artificially inseminate the hens if you wanted to cross the two breeds. It's relatively easy to do all you really need is an eyedropper and the two birds. As with color most likely half blue half black with red leakage.
No that is not spangled. Spangled look like hamburgs in which it's basically a solid base color with spots on the end of the feather; silver spangled look like Dalmatian chickens to me. Your chicken almost looks like a young salmon faverolle Pullet starting to develop adult plumage
breeding the offspring of the original cross together may produce a small portion of blue laced reds depending on the hens genetics, the EE that makes the black to show the blue can cover a lot
I agree. Chocolate laced male over silver laced hen will produce 50% female choco laced birds and 50% male that are split to chocolate. Silver laced male over chocolate female will produce 50% silver laced female and 50% silver laced male split to chocolate.