Crooked bumper

I just bought an 02 double cab PreRunner with 135k miles. Truck runs great and is in excellent condition except for the front bumper. When I got it home I noticed the front bumper was crooked and slightly pushed in on one side obviously from a minor impact (car fax showed zero accidents). It doesn't affect the truck but it does bother me; would this be difficult to fix? It's so minor that I didn't notice it at first until I was admiring my new purchase. Thanks!

 

The same thing happened to me at home depot, some one didn't make it out of the parking lot and barley hit the side of the bumper. Just take it off and bend the brackets back, You can do it by hand.

 

That's what I was thinking; any link to instructions on how to remove the bumper?