[Fufu]

Dead characters cannot receive cards for any reason, not even Charity, and cannot level up or win the game

This prevents players being able to win with certain card conditions that could be gifted by other players.

When the next player begins their turn, your newly revived character appears and can help others in combat with your Level and Class or Race abilities . . . but you have no cards, unless you receive Charity or gifts from other players.

The character is no longer dead, and now the player may receive cards from other generous players.

On your next turn, start by drawing four face-down cards from each deck and playing any legal cards you want to, just as when you started the game. Then take your turn normally.

Now the player can create their hand like in the beginning of the game from the Setup phase.

Reference:
Munchkin Rules