Here are some prices from the holiday resorts around Split, Croatia.

At a restaurant:
The price of a bottle of house wine (0.75l) => 14$ [9.5 euro]
The price of a sirloin/steak meal => 10 euro
The price of a pizza => 5 euro
Typical food => Fish is really the Dalmatian speciality, sold by the kilo: 12 euro

At a bar
The price of a bottle of beer (0.33l) => 2.5 euro
The price of a cocktail => 3.5 euro

At the local supermarket
The price of a bottle of water (1l) => 0.8 euro
The price of a can of Coca Cola (0.33l) => 0.7 euro
The price of a can of beer (0.33l) => 0.8 euro

Rent a small car
Rent of car for 1 day => 40.7 euro/day
Rent of car for 3 days => 112 euro
Rent of car for 7 days => 224 euro

Sources:
http://www.adriatica.net/rentacar/rentacar_en.htm
http://www.igougo.com/dining-reviews-b148834-Split-Luxor.html
http://croatiaonline.blogspot.com/ [most of infos]