Betsy!! Your initial question might create another burning folder of responses. Pete will hopefully respond to your 3rd question, although I think his initial response is right. The main energy point on the foot is on the bottom towards the front, called the yongquan (sp?) or bubbling spring. Thinking of the foot in general, or toes, probably activates or involves this point. If I think of my toes, I can easily feel the part of my foot involving this point fill with qi. The whole bottom tends to light up. It is like focusing on your palms, it activates the main point there, the laogong points in the center of the palm.
