It depends on the bird and its age. You're probably looking for a simple answer, but there isn't any simple correct answer. Some of the longest lived birds such as large parrots or albatrosses may...
yes
Birds are believed to have evolved long before humans did, given the existence of bird remains and fossils long before any trace of humans on Earth.
no
By hand or by putting pieces of bread or other food on the ground for the bird to pick it up and eat it.