As annoying as it is, I think you're just going to have to wait and see until you get it. Can't your friend send it over?
It's kind of a tale of two stylings with those pics, it looks a quite cool yellow in the first pic, I could only see myself pairing it with a sort of airy linen or ramie unfitted shirt with a few (discreet) buttons open that's semi transparant and has a bit of texture and unlikely to wear it outside of summer. The waist is really fitted and high, whereas in the second pic it looks like it sits lower, but considering the humongous jumper volume underneath it's probably a size or two bigger, and it looks like it pairs better with warmer browns, but it also looks like they forgot to turn the lights on...
About removing buttons, eh, it's pretty much a design feature, they're not my thing (buttons as features) but I think they sort of belong on.