The turntable is perfect for her. Plenty of under $75 cartridges available for it. Unless she really wants to have FM/AM (which I would doubt, she'll stream if not listening to vinyl), I'd suggest an integrated amp instead of a receiver, looking on this site and others, they go from $50 to $600, you'll get more wattage, perhaps features (like 2 tape-in's so she can stream into one of them and still have the other available) and most likely better sound/better brands then going with a receiver.
Speakers - bookshelf or floor? Prince range? In most cases I would suggest new-fairly new rather then used/old.