1. In a small resort lines won't be bad. If you are going in three weeks school half-term holidays should have finished, so even in the larger resorts like Verbier the lines should be ok.
2. It depends on the lift...and time of day.. and day of the week.. and weather..
3. Depends again, if its really busy, e.g. half term, it'l be a scrum at the lifts, but generally its not too bad. I didn't ride for two weeks during school holidays last year as it was too busy, but again, i think you should be ok in three weeks.
4. Most gondolas have ski rack outside, most cable cars you bring your skis inside. Same as anywhere.
5. Like anywhere, avalanches can happen at anytime, don't go off-piste unless you know what you are doing. Europe is a lot steeper and more unpredictable than Vermont. Take a guide.
Why are you so interested in the lifts dude? You should be asking questions about the amazing riding you are about to experience, its a world away from what you will have been used to! Have a good one!