Pick up at your hotel on time. It is a private service. 2.5 hours a drive to the Jinshanling Great Wall; the driver will drop you off at the Jinshanling main gate and pick you up at the east gate. You can spend 2 - 3 hours wandering around the wall. The driver will wait for you at the east gate.
Recommend leave with early time. Beat the crowds during the early morning visit to the Jinshanling Great Wall. Starting early time can avoid the morning rush hour. The traffic jam in Beijing is very horrible.
Entrance ticket fee at 65, shuttle bus at 10, you can buy it at the ticket window without any problems.
The driver speaks basic English, you can ask him to call the office for a help if need.