Bus tickets will be sent to your hotel where you stay in La Paz City, or it will be dropped off at the bus station --upon request--. (But always your names and number of the passport are in the system because those vouchers are e-tickets).
Remember: You always need to arrive at the bus station 45 or 30 minutes before the check-in Bus.
Buses to Cusco leave from the bus station in La Paz at 07:30 a.m.
Buses are really comfortable and suitable for sleeping with toilets on board.
