Sized for a medium headed adult woman, if for a larger head use heavier yarn and 4.5 sts/” for a child 5.5 sts per inch.
Both double points and a 16” cable needle are required.
The general information, on materials, techniques, etc is on pages 7:11 and it is the only place where gauge is included.
All patterns are charted. Almost any number of colors from 2 up can be used, but the row gauge for single color knitting so solid color sections would require reworking the pattern.