Hey barbie,

In Italy check the "rosticcheria´s" in larger towns..they stock everything,all delicacies you can imagine,although not very cheap. Cool thing about Italian winebars: you can get almost everything by the glass,not just the cheaper stuff but also great vintages of,say,Barolo or Brunello di Montalcino,which makes sampling truly great wine affordable.
In Barcelona try the markets(like the Boqueria,easy to find) and head for the Montjuic to picnic.There´s salad bars in cities with a lot of students (like Barcelona and Paris) where you can get stuffed for about 8 euros. Avoid normal restaurants everywhere, too expensive with your budget.Tapas bars are ok.
10-15$ is not much, I wish you good luck..Enjoy your trip!

In Barcelona ask around for the Champaneria, it’s a place where you can get a sandwich and a bottle of champagne for about 5 euros, and you eat there standing up, and its lots of fun.

Also, try "La Fonda" or "Les Quinze Nits" in Plaza Real. Both of these restaurants are owned by the same person, and look really fancy and nice, but have main dishes for around 5-7 euros that are really delicious.

Toulouse, France (less than 4 hours from Barcelona) has quite an array of chocolatiers, seems like they are at every other corner.
Their specialty is dark chocolate, the percentage of cacao (that’s how they spell it) is listed on each package.
This chocolate wasn’t cheap, but it was silky-smooth and quite intense.

Agree with Sol Invictus about the Brunellos. If you already know what you especially like, you can pursue that particular wine once you are over there. (Rioja or jerez in Spain, Brunello/Barolo in Italy, Sylvaner from Germany’s Alsace region) etc.)

And olive oil! I get into the olive oil as much as I do the wine.
Our backpacks were doing some major clanking when we went home.

Cheese
You probably have an idea of what you like, but these are a nice start.

There is this cheese in Spain that I used to love, it is shaped like a breast—or I suppose it is more like a nipple.
Tetilla

Some cheeses to look for in Paris:

Cantal

Bleu d’Auvergne (like Rocquefort, but creamier)

Big bump…
 
Can people list some of their favorite inexpensive cafes/restaurants/pubs, and why you like it so much?
 
This can be any city anywhere in Europe, I’m not picky.  This thread already has some great recommendations, it’d be cool to have a lot more all lumped into one topic. 

Yeah it just seems to get overlooked.  Stickys often do…out of 9 posts, only 5 actually contain info about bars/clubs/pubs.  This one’s practically that far already so I just figured it might catch on for a few days and get some more updates.