I love the idea of paring the sheet set with a couple of these throw pillows. I'm totally into pillows, the more the merrier. I think 2 sleeping pillows, 2 euro pillows and a couple of throw pillows is great... I would have more if I had anywhere to put them!
They're showing a bunch of vintage-look quilts, the style part is somewhat questionable. I guess it would depend on the rest of your room...
I've never been a big fan of quilts especially with busy multi-prints, but in the right room it could have a certain charm. I would say less is more, if you opt for a busy/colorful quilt keep everything else as low key as possible. And it's always good to keep your rooms as pared down as possible... to much "stuff" around never looks good, even if the "stuff" is expensive chachkes. One nicely placed chachke is fine.
If you just want a dash of vintage chic, I'd just toss one of these cute bird pillows ($35 each) on top of my bed with my existing pillow shams.