Ciao Sasami,
Yes, in Italy you buy stickers and card (made in Italy) where you buy newspapers and magazine ^^
But they sell only the stickers (called "figurine") available in this moment, not the old ones.
One set is available just for a couple of month, then, to have the missing ones, you have to write to the publisher (as a magazine)
There are little shops for collectors who sold old stickers, but usually they have only the sports ones
(football of course!
) It's hard to find the anime stickers >_<
I live far from Rome, but I dont' know shop selling japanese trading card, no more.
5-10 years ago it was different!
BUT at th end of October (29/10 to 01/11) there is the bigger comics event in Italy,
Lucca Comics. Here you can find everything about anime/manga stuff is available in Italy.
(Lucca is a city near Florence)
There is also Romics (Roma Comics) but it ended... yesterday ^^''''''
If you have any other question just ask