You have to be a member to buy anything at all on the site.
When you sign up, you have to buy 10 movies at MSRP within a year. You get 4/5 for $1 each when you start, plus an additional 1 or 2 for a discounted price each.
After the sign-up, you have to buy 4/3 titles (or more depending on the initial order) at regular price. The easiest way involves the Feature Titles. Each month Disney will spotlight one movie (either a new release or a pre-order) and may possibly pair it with a similar movie or another new release. In addition, you can choose one of 2 optional titles to add to your order at a discount. All that counts as one commitment title since only one title is at full price.
You start out with a member discount of Buy 1 Get 40% Off all other DVDs and Blu-rays (the 1 can be the Featured Titles). As you get more commitment titles, you can get 50% or 60% off.
Basically, buy 3 or 4 Featured Titles and you will be good. Or you could select "No Offers" and knock everything out in one go.
Uh no. Where are you getting the 10 number? Seriously use the FAQ here.
5 movies for 20 cents a piece, 1 for 11.95 and 1 for 8.95. These 7 all come with free shipping so you are literally out $21.90 plus tax if you are in a state they apply tax to.
Then you have to buy 2 (yes just 2) commitment titles. The b2g1 (mixed reports about it no longer being available... it shows up for me here: disneymovieclub.go.com/webapp/wcs/stores/servlet/DMCOtherOfferCmd?catalogId=10051&langId=-1&storeId=10001&offerId=24324) counted as two commitment titles so if you did 24.95 titles like Pirate Fairy and Frozen you could get an extra free one AND cut 10 dollars off the grand figure.
Regardless, the absolute maximum one should spend on the Disney Movie Club is 89.70 for a total of 9 movies. Any one who advises you it costs more is doing it wrong.