The bits are easy to remove - just pull it out of the bar (the bar is magnetic). Then pull the silver cap out to reveal the other bits. Grab the one that you need and simply place it in the bottom of the bar - the magnet will grab it and pull it to the bottom.
Yes
The gray cap is pried open. Does not screw off.
Pull up the silver top. Have to use fingernails or a flat edged tool until it frees up.
You can find this info once you buy it and look at the shipping cost before you click to buy.
This is way too large for that, I know how frustrating those can be!
yes
A pair of kitchen scissors