You gain titles and emblems by completing certain challenges on multiplayer, check your barracks for the challanges.
Here is a list of all the titles and emblems for Call of Duty modern warfare 2 on the Mordern warfare wiki: http://callofduty.wikia.com/wiki/Callsigns
look at call of duty wiki
Your face thats the answer
By completing challenges or raising in rank, same for emblems
you can unlock them by ranking up to various levels and complete certain challenges.
Everrything resets except for titles and emblems. So yes.
mine is the How The? and the throwing knife emblem.. to me they were kinda a challenge to get
There is a call of duty wikia page, google for: Modern Warfare 2 Callsign WikiaAnd it should be the first result.It has a list of all the titles and emblems, and how to get them.here i got you a link of the full list of titles and how to get themincluding what the titles mean for example FNG title means fuc*ing new guyhttp://callofduty.wikia.com/wiki/Callsigns/Titles = titlesand if you need it here's the emblemshttp://callofduty.wikia.com/wiki/Callsigns/Emblems
They can be found at the Call of Duty wikia. A link has been added under related links
Yes. The whole list of them is available on the related links for Call of Duty Black Ops and clicking on the title or emblem provides details
You can obtain new titles and emblems but that is all, everything else such as weapons and challenges are reset.
Get to 10th prestige, unlock everything (challenges, emblems, titles, weapon challenges and camos, etc....)
No, all your guns are reset to the same as you were when you were level 1. The only thing you unlock when prestiging is emblems and titles.