There's a really useful tutorial on making craft foam armor here:
http://www.entropyhouse.com/penwiper/costumes/helmsdeep.html
and an awesome layout of the design patterns here
http://fc03.deviantart.com/fs28/i/2008/064/a/0Zelda_Armor_Designs_Printouts_by_Zeldaness.png
I'm about to make a set myself using these two sites
Twilight Princess
Yes it is
not yet
you can change the armor color if you make a custom map:)
There is no way to make zombies wear leather armor, but sometimes zombies can naturally spawn already wearing the armor.
Ebay or any online sites
they made armor to protect the army for when they went to war.
you dont make cloths you make armor. to get cloths you need a texture pack see link in related links to find armor instructions.
you can't
No
dragon + knight knight= armor+human armor=metal+tool
you can't but there is iron armor which looks like stone