rule clarification

[pinchus]

I'm new to the game and can't figure out a few rules :)

1) are you allowed to give charity even if you have five cards or less?
for instance you want to give a monster or wandering monster to one person so that they can prevent someone else from winning on their next turn,

2) If you have a big item in play and you want to play a different big item, do you have to sell the item or can you just replace it like a class or race you don't want anymore?

thanks