Minecraft currency?

I have a minecraft server with friends. We decided to call our currency toilet paper, but now we have some questions.

1. How can a player see how many toilet paper he still has in the scoreboard?

2. How can I make it possible for the player to withdraw money but not have numbers in the scoreboard (i.e. That he can't go further than 0)

3. How can I convert the toilet paper from the scoreboard to playerheads?

4. How can I make a player redeem a player head (which he has in his inventory) and then get money (toilet paper) in the scoreboard?

5. It would be good to do everything with buttons so it should be commands. If no commands go please link a plugin what you can take for it

Take an economy plugin and change the name to "Toilet Paper". Any of the numerous economy plugins certainly offers this possibility.

The second sensible option would be to simply use a toilet paper head as the item currency. Adminshop 10 slides = 1 head. Or something like that.

1) this.player.setScoreboard…

Placeholder Api stop

2) https://github.com/...rd/r/board

Says it all

This video could help you:

Do you know the commands for version 1.15.2?

As far as I know, the commands in Minecraft remain the same in all versions in 1.15.2.