The Chamonix Valley is divided into five main resorts, Les Houches, Brevent/Flegere, the Aiguille de Midi, Le Tour and the Grand Montet. Les Houches, the closest to the chalet, is great for piste skiing, and ideal for children and beginners. Brevent/ Flegere is south facing, so sunnier and has something for every level of skiers. The Grand Montet is probably the best ski area in the world for advanced skiers. It is north facing and holds great snow. Le Tour is brilliant for all levels of skiers. The Aiguille de Midi lift is for off-piste itineraries only, including the famous Valleé Blanche run. The VB is a must if you are an intermediate skier or higher. We can put you in touch with guides for the day.
You can either buy the Mont Blanc Unlimited pass which covers all these areas (as well as Courmayeur in Italy and St Gervais) or you can buy the cheaper Cham Le Pass which just covers Brevent/Flegere, le Tour and the bottom of the Grand Montet.
Cham Le Pass is fine for beginner/intermediate skiers; advanced skiers should get the Unlimited pass. The Cham Le Pass does not include Les Houches though, so a complete beginner might prefer to get Les Houches only.
You can read all about the options and the different resorts, as well as pre-order lift passes here. If you pre order lift passes you can get them sent to the chalet so they will be waiting for you when you arrive. The address is 147 Chemin de la Georgeanne, Les Houches, 74310.
For kit rental we would recommend Concept Pro in Chamonix. They have good kit, easy parking and a great service. You should book before you arrive.