This is an old injury, so at the time the story starts he's as adjusted as he's going to get. He has no access to prosthetics or special shoes.
Basically, I want him to be able to walk without much difficulty. An odd gait is fine, but I'd like to avoid him relying on a cane or other device. At the same time, I want to interfere with his ability to run, either by making it totally impossible or slowing him down.
I've searched for various things like "toe amputation" in combination with "gait" and "recovery," and I've found some information, but not with the level of detail I want. I've found out that that people do adjust fairly well to losing toes, despite myths that if you lose x toes you'll never walk again, etc. I've found out plenty about modern devices to help people who have lost toes. But nothing detailed enough that I can decide how much my character has lost.