So my idler pulley fell off an I was just wonderin if it would be ok to run it without it just to work an back tomorrow? I'm not to good with vehicles but I'm wantin to learn so any help is appreciated

 

Yes it's fine to drive without it.. it's for the air conditioner compressor only. However, either cut the belt off or find a DIY to remove it as you don't want it to possibly get tangled with other belts and cause a bigger issue.