Monthly cost in dollars for a couple if we consider price of food, car gasoline, electricity, water, garbage, heating, mobile, internet, clothing, rent, household supplies, electronics.

And if we select only the biggest cities.

736 - Moldova
886 - Albania
974 - Serbia
981 - Ukraine
1039 - Romania
1040 - Pologne
1085 - Montenegro
1158 - Hungary
1161 - Russia
1191 - Greece
1199 - Lettonia
1229 - Croatia
1260 - Lithuania
1277 - Estonia
1342 - Czech Republic
1482 - Slovakia
1503 - Portugal
1567 - Spain
1776 - Italy
1824 - France
1830 - Germany
1907 - Austria
2017 - Belgium
2061 - Ireland
2165 - Finland
2212 - United Kingdom
2423 - Sweden
2535 - Netherlands
2562 - Danemark
2653 - Iceland
2686 - Norway
3862 - Switzerland

Average : 1675$ per month.

Source : Numbeo.