What is the most marketable Masters degree? The best school to get said Masters degree from?

Answer 1

Engineers with Masters are at the top of the pay scale.

Depending on your area of interest, you can view the top undergrad engineering programs here:
http://colleges.usnews.rankingsandreviews.com/usnews/edu/college/rankings/rankengineering_brief.php

For graduate schools (in order):
MIT
Stanford
U of C - Berkley
Ga Tech
University of Illinois -Urbana - Champaign
Carnegie Mellon
Cal Tech
USC
U of Michigan
Cornell

Answer 2

1) MBA
2) Harvard, Yale, etc...