Yes. Even though an RBI is a run batted in, statistically it still counts as an RBI. That goes for a walk or a hit batsman
In both cases (base on balls, hit by pitch) the batter is credited with an RBI.
Yes, if a batter is walked with the bases loaded the batter is credited with an RBI.
Yes, the player is credited with a RBI.
No ... no RBI is credited for either a passed ball or a wild pitch.
Yes, only things that don't count as at bats are walks, hbp or if a baserunner gets thrown out before your at bat is completed.
i believe that if you are walked or hit by a pitch and it scores a run you are accounted with an RBI, and the pitcher gets an earned run
it is scored a wp the batter doesn't get RBI