#2
depends on the settings and your resolution and your printer. maybe just take it to kinkos and make them do the work
#3
What scale is the template in?

If it's 1:1 you print it at 1:1, etc.
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#4
What I did to print that, i converted it to .jpg using a program, and then printed it at about 135% on Paint. I could only get 8x10 or so, and the paper is A0, much larger.