I got 2 the other day and they came with 1 plain medium-ish red plastic pick (each). Not a particularly good pick as a matter of fact, in my opinion.
A guitar pick is held between the thumb and index fingers of your strumming hand.Usually it's held closer to the tip for single notes, pinch harmonics and for a firmer grip. It would be held closer...
This question cannot be answered because you didn't tell us who "he" is.
first finger and thumb use middle finger hit other string
None, a pick is not a measure of volume, however a peck is unit of dry volume, equivalent to 2 gallons or 8 dry quarts or 16 dry pints.