4
how much does the king value if it is a normal piece
4 is the generally accepted numerical value, and I think that's accurate. In most endgame situations it can actually be much more useful than a bishop and knight in two very useful ways.
1. The king is much better at defending pawns than knights and bishops (3) are, because they move in somewhat similar ways and can always be next to each other. The pawn can also move without moving away from the king's defense if it's a square ahead or on the same rank, whereas a bishop and knight's defense of a pawn is lost whenever it moves. However, it's generally not as good as defending pawns a rook (5), which can simply sit behind it and keep it constantly defended.
2. The king can, in some situations, trap pieces more easily than knights and bishops can. For example, a king can trap and attack a knight in any corner of the board (if the knight is on a8, it would be dead if the king made it to b7), whereas every other piece (except the queen) can only paralyze it. (However, if the knight is merely on the side, it cannot be trapped or even prevented from moving by the king, so it's not better in every scenario.) Also, it's impossible to checkmate a bare king with only a rook and a bishop or a rook and a knight, but it is possible with a rook and a king.
infinite. he is not normal piece
how much do you evaluate your soul? (not your life)
I mean it is like the pawns or rooks or bishop when it is just a normal piece