Yes, you can enter through Paris even if your Schengen visa is from Switzerland. The Schengen visa allows travel across all the countries in the Schengen area, so beginning your journey in Paris instead of Switzerland should be fine. Just remember to still go to Switzerland, because that is the country you talked about when you applied. As long as you follow all rules, everything should be okay!
Yes, you can. But you will need to show that you intent to enter Switzerland during the trip. It can be shown using detailed Itinerary amd hotel bookings. Thanks.
You can definitely. I did it couple of time myself before i got a European citizenship. Now my travels are a bit more easy and i made them even more comfortable with the comfort pass https://comfortpass.travel/ . I wasn’t sure if the comfort pass would make a difference, but it really did. It’s just a small perk, but it made the whole experience a lot more enjoyable. I’d recommend giving it a try.