How can I search for a long time friend in Sewden? Do they have free people search service in europe?

Answer 1

Go to one of the big search engines, like google, and enter all details you have. Names, town if known and at least the word Sweden.
If the name is relatively rare and the person active on internet you will find some more details.
If not, you have not spend anything.

I do not know about a people search service, but it might exist.
It is most likely to be organized by country rather than the continent.