Hi Andrew
Welcome to the forum!
The timing of your flight/10:30 transfer should be ample time, but if delayed then yes it's no problem to take the next one, subject to availability. You can either just turn up to the next one (or later if appropriate) or you can call ahead (number on your confirmation voucher).
You don't need to specify which shop you'll collect from - for Xalet Verdu you'd either go to the shop in the village or the one at the top of the gondola, but it's entirely up to you, and you can decide once you arrive.
There is a beginner's pass but it only covers the magic carpets, not the gondola, so it's hassle unless you have a car, plus by day 2/3 she should be aiming to get onto chairlifts anyway. The difference is tiny, plus you get an extra discount for lift pass plus equipment on our website, so usually it's better value and easier just to get the area pass. When you arrive you give us a call (number on your voucher) and one of our team will come to your hotel or the rental shop or wherever is convenient to meet you with your passes and answer any questions you have eg. about where to go etc.
Just ask if you have any other questions.
Steve