My talus bone hurts! Do you think I might have fractured or broke it?

Depends. Did you have a traumatic event recently. Talus sits under the ankle and doesn't usually fracture unless you have a high velocity injury. You may just have arthritis in the ankle joint. See specialist for x-rays and treatment.
Maybe. If there has been trauma to the area a fracture is possible. I would recommend a visit to the podiatrist for an exam and possible x-ray.