My younger son walked at 9 months; my older at 12 months, although he had had major skull surgery at 3 months, which maybe delayed him.
Both boys "talked" with baby sign language by at least 6 months. They responded with the appropriate signs if you asked them. When my older one was 13 months old, I said (without gesturing), "walk to the door and touch it." And he did it! He obviously had a receptive vocabulary at that point.