1. red, blue, green, black, brown
2.1 danger/ roads, water, shrubbery, etc., manmade stuff, contour lines
2.2 It means that the map is made of paper(white paper)
3. Which flag? Marine Corps(scarlet for and gold for looking awesome) or US(red for valor, white for purity and blue for justice)
http://www.funmunch.com/events/usflagday/colors.shtml
4. Right side step, March
5. Four
...Good luck.