I do the monthly pass and go to the meetings every week for WI and the half hour meeting.
I think they still are waving the registration fee to join up, so you just have to pay for the weekly meeting fees. Monthly pass is 40$ (so 4 weigh ins for 10$ a time, Then 17-week pass is about 13-14$ per week, and then Pay as you Go for a 15$ weekly fee.
You can go to more than one meeting each week, but I think the leaders have the same materials each week, so you can find a leader and class your comfortable in or switch it up.
They give you the starting booklet the first meeting along with the little planner-like book with the slider. Then each week you get the next booklet. I don't know how many there are, I've heard ten mentioned but there might be more? I'm only on week 4 myself. If they gave you all the materials the first week they'd lose a lot of customers, as a lot would stop paying for the rest of the meetings. Makes sense since it is a business.
Best of luck with your weight-loss journey!