No,it is called Wicket-keeper
Yes,cover is a fielding position in cricket
the mark a batsman makes is to show him where middle stump is so he knows where to stand. he can also put his mark on off stump or leg stump.
2nd position, runners up
A bat-pad is a fielding position in cricket very close to the batsman, or a fielder in this position.
you put it on the Crees and your foot just behind the Crees
A game of cricket - it is a position to stand on the field