My brother was born with one club foot. Initially they try to straighten the foot with casting. They stretch the foot, cast it. Straighten it more, cast it, etc. There are more severe cases where this isn't adequate, and this was the case with my brother. His foot was just too deformed, so he ended up having a couple surgeries. The first surgery he had at about 1 yr, then I think he had another at about 4.
Overall this birth defect hasn't hindered him much. He was the star player on his middle school basketball team, played basketball all through high school, and even some football. When he entered college he did shotput for 2 years for a big ten school.
But he does also have limitations. His range of motion on his foot is a fraction of a "normal" person. This causes some of his muscles through his foot and calf to be tighter and makes him prone to injury and a lot of soreness if he runs or stands a lot. He'll never be able to have a "physical job." One summer home from college he tried landscaping and that just didn't work. His foot hurt way too much. But that's pretty much it. He's now just about 24 (bday 11-7
and apart from the scars from surgery, the average person would never know anything was different. He walks normally, etc.