Uhhhmm, no, you can on Modern Warfare 2 though.
you unlock more emblems
You can prestige in Black Ops multiplayer if that's what you mean.
15th prestige
yes
in cod black ops there is a 15th prestige and in mw2 there is only 10 prestiges because to prestige in mw2 you have to get to level 70 but in black ops you only have to get to level 50 to prestige
kill more and die as less times as you can.
Google black ops prestige symbols. If none of the symbols are on your playercard, you haven't prestiged.
rc-xd
No, you get nothing but a new prestige symbol.
NO
nothin
prestige is another type of way to level up in black ops. once you get level 50 in blacks ops you can start your prestige. when you start your prestige you start back at level 1 with no guns and no perks. but you get the honor to be called prestige 1. once you get to level 50 again you can start again back at level 1 with prestige 2. and you can keep going until prestige 15. once prestige 15 there is nothing more you can do.