[paintless]

if the damage doesn't affect the driveability of the car, and you have checked to make sure there is no underlying damage ie the front core cupport isn't pushed back or the radiator isn't damaged you'll be just fine driving it as is.
Another hint, depending on what vehicle you drive, there is always a good possibility you can find an undamaged bumper cover at the junkyard, alternatively you can talk to some body shops to see if anyone will just fix (instead of replace) the bumper for a cheaper price... or if you are feeling adventurous, go out and get sandpaper and jb weld and try to fix the bumper yourself, getting a front bumper resprayed should be relatively inexpensive.
good luck