Hmmm, for that leg I wouldn’t consider it.
TGV has a more comfortable and wider seats in first, but no extra at-seat service or newspapers like you have on some other trains like Railjet or ICE with 1st class “or standard première” in central Europe. Business première is not included in the pass. The longer the journeys, the more worthwile 1st class gets. Your trip isn’t too long.
And indeed, very expensive reservations, like Angelo said. Not worth the price difference in my opinion. Second class TGV has also comfortable seats.
Local trains in France and Switzerland often don’t have a first class. If you really fancy a bit of quietness and comfort you can consider it, but if you travel off-peak and off-high season it’ll be equally quiet and laidback in second class.
Note that the Jungfraubahn and the BOB are not included in your pass. You get a 25% discount though. And Jungfraubahn rates are astronomically high (and don’t even have 1st class), but quite the experience I gather. Never tried it though.
If you plan well in advance, you might be cheaper off buying separate tickets than a pass for the trip you’re planning a bit in advance.
Especially with the TGV you can do some deals every now and then, perhaps even in 1st.