some quests from Hamlet.?

Question

1:what is cap-à-pie
Two nights together had these gentlemen,
Marcellus and Barnardo, on their watch,
In the dead waste and middle of the night,
Been thus encountered: a figure like your father,
200 Armed at point exactly, cap-à-pie,
Appears before them and with solemn march
Goes slow and stately by them. Thrice he w

Answer 1

From head to foot; at all points.

Answer 2

"Cap" is obvious; "pie" comes from the Old French for "foot" which in modern French is "pied."