Which brakes are grabbing and rubbing? Just one wheel? Or both front wheels? The back wheels?
The way to tell is to apply your brakes hard, when stopped. Then drive for a couple of blocks when the car is cold. Then very carefully feel the drums and rotors. They should be cool to the touch. If one or more is hot, then that's the dragging brake(s).
Since it was a collision that produced this damage, look for damaged and flattened steel brake lines. Such damage means the brakes will release very slowly, or not fully release at all.
Also, if you just have one wheel that's dragging, consider replacing the flexible brake line for that wheel. These lines can collapse internally, causing the same problem.