yes
No, the batter is not out. The runner could be out though. For example in Little League if the runner touches the ball before it goes by a fielder, the runner is out. (The pitcher does not count as a fielder for the purpose of the rule) The runner is not out if he/she is touching a base.
more than 100 million kids play little league in the world.
In any league, the last pitcher to pitch the ball is responsible for that batter. If he strikes him out, the credit goes to him, regardless of how many pitches he throws.
ususally they cannot because the batter could confuse it with the ball
The force-out rule is the same in little league as it is in the majors. If there is nowhere else for the runner to go because the runner behind him must advance, the force-out is at the base he's headed to.
Only if the pitcher warms up on the diamond.
Yes
MLB players do that sometimes. I don't see why the rules would be different in little-league. A player can hit the ball with the bat in any way he pleases.
If you are generically using the word "little league" then the answer is yes. Under USSSA rules you can bat the entire lineup and after the 9th batter the remainder are called EH's (extra hitters) or terms similar. These individuals will not take the field but bat when the 10 & 11 slots come up. If you are speaking of Little League Baseball Rules (official term) then I believe you bat 9 and have substitutions.
In Little League, the batter is out if they hit the ball with one foot completely out of the batter's box. There is no penalty if they don't hit the ball. There could be a penalty on the pitcher if the reason the batter has a foot out of the box is because the batter didn't finish stepping into the box. A quick pitch is an illegal pitch which counts as a ball.
Home Plate is in fair territory.
Not sure exactly what you're asking here. Neither a batter nor a base runner may INTERFERE with a fielder attempting to field a ball. If there's contact without interference, nothing happens. If a fielder is blocking the path of a base runner from reaching a base, the runner is definitely permitted to touch that fielder -- up to and including ramming his elbow into that fielder's neck.