No way of knowing age unless it is brought to a vet for a physical and they can determine rough estimate, but it would be impossible to determine age based on a picture.
Yes, the feet look messed up. Definitely not supposed to look like that. Is this your bird? Are you considering purchasing it?
If someone is trying to sell you this bird I would pass...just based on the feet alone. Obviously the previous owner has not cared enough to get this baby looked at. Toes maybe were injured in the nest or possible inbreeding (breeding related birds) causes health and genetic deformities.