What do I have to do to unlock tour mode?

Click on the Tour and then read the rules thoroughly, then select a group to partake in, pay entry fee and do your best to move on to the next round to enter and play the whole game. Mind you that you might want to stock up as much coin as possible to maintain playing said 1v1 tourneys. I am still a month fresh and despite having the coin, I do not desire it just yet so I pass on them, I do play the single challenges such as hole to hole and hole-in-one which are Free to play every 16 hours but the Hole in one only allows you the equipment it lets you use in that play to your best, missed shot mean you just ended the streak you had so collect that chest of goodies as you have no choice to pass on it.