Yes. Only the location of the ball is used to determine whether the touch is an infraction.
If the keepers feet remain inside the box he is technically inside the box so he can pick it up.
No, the keeper cannot pick the ball up after his own player intentionally plays it to him using the feet.
A goal keeper is allowed to touch the ball with their hands when the ball is inside their own penalty area. If a goal keeper does so outside of the area, then a direct free kick is awarded to the opposing team.
I'm going to assume that you are asking about a ball that is deliberately kicked back to the goalkeeper by a teammate, then picked up. If the keeper touches the ball with his hands outside of the penalty area (the "18"), the offense is handling and the other team is awarded a direct kick from the spot where the keeper first touched the ball with his hands. If the keeper touches the ball with his hands inside the penalty area but outside the goal area (the "6"), the offense is goalkeeper handling and the other team is awarded an indirect kick from the spot where the keeper first touched the ball with his hands. If the keeper touches the ball with his hands inside the goal area, the other team is awarded an indirect free kick from the spot on the goal area line nearest where the ball was first touched by the keeper.
A defender may not deliberately handle the ball anywhere on the field. A goal keeper may handle it only in his own penalty area. Where his feet are would not matter. Only the ball's position matters.
Depends if you scratch outside or inside your pants. If outside, no, if inside, if no smell, then no. If your hands have been inside your pants and they smell, wash.
No.
Yes. If the ball is kicked to them or thrown-in to them directly from a team-mate. If the goal keeper releases the ball from their hands they cannot pick it back up again until another player touches it.
A goal keeper may never use their hands outside of their own penalty area. A goal keeper may not use their hands, even in their penalty area, when a team-mate deliberately plays the ball to them with their feet. A goal keeper may not use their hands, even in their penalty area, when a team-mate directly throws the ball to them on a throw-in.
on an outside pitch, step toward the ball and extend your hands. be sure not to step out of the batters box though. on an inside pitch step back with your front foot and pull in your hands and make a quick short swing
If a defender passes the ball with his feet to the goal keeper, the goal keeper may not touch the ball with their hands.
No because it will be classed as handball and the other team will get a free kick.