It's only on xbox LIVE but you go on customize than character the you start customizing!Hope it helped.
go to the custom and press square
match settings
the violence settings can be changed
the class you get after i believe reaching prestige 14. its the 10th custom class you get
match settings
Depends on what controls you are using, look in the settings
To take off the time in multiplayer matches in Call of Duty: Black Ops, you typically need to adjust the game mode settings. If you’re hosting a custom match, go to the game settings and look for options related to time limits, where you can set them to "None" or adjust them as desired. Keep in mind that standard public matches often have set time limits that cannot be changed.
You can turn off blood and some language under the settings option.
you have too be signed in with other people then you can change evrything
The call of duty world at war is not a prequel to call of duty black opst.
call of duty black ops
This really depends on your parental settings (If you have them on). If you don't then yes, just like any other call of duty.