Spending money? Like when he wants to go to the mall and hang out? What a silly question.
I understand that popes never buy anything, or deal with money at all.
The vatican admin deals with all that.
The Pope is sometimes sent cash gifts by individuals or groups. There is also a Knights of Columbus trust fund which contributes its annual income for the use of the Pope.
It’s known that pretty much all the money the Pope receives goes to charitable works he chooses ... but I suppose if he wanted to get a cup of coffee on the way to St. Mary Major, he could have a few Euros in his pocket from what he’s been given.