Touch move means that if you touch a piece and it has a legal move you must play it. Touch capture means that if you touch a piece of your opponent's and you can capture it you must do so.
No, a pawn cannot capture a king in chess.
No, pawns cannot capture kings in chess.
No, a knight cannot capture a king in a game of chess.
No, a pawn cannot capture a king in a game of chess.
No, you cannot capture a king with a king in a game of chess.
No, you cannot capture a king with another king in a game of chess.
Yes, in chess, a king can capture a pawn if the pawn is within the king's reach and there are no other pieces blocking the capture.
Yes, in the game of chess, a king can capture a bishop by moving to the square occupied by the bishop.
Yes, in the game of chess, a king can capture a knight by moving to the square occupied by the knight.
Yes, a king can capture a piece in chess by moving to a square occupied by an opponent's piece.
You capture it.
Yes, in the game of chess, the king can capture the queen if the queen is within the king's range of movement.