The most populated European countries are
The most visited European countries are
If you mean popular as in which country receives the most tourists, then the answer is France. France is the #1 tourist destination in the world, receiving about 80,000,000 tourists annually.
If you mean popular as in which country is the most populous, then the answer is either Russia or Germany. Russia's total population is about 143,000,000 with about 110,000,000 of those people residing in European Russia. Germany has 82,000,000 people and is wholly in Europe, so there is no controversy there.
This is totally a matter of personal opinion.
Austria is a country that is in the centre of Europe and would be considered as a western European country.
No. Belgium is a western European country, but it is a member of the European Union.
France?
Most people hold that Italy is in Western Europe if Europe is strictly divided between Western Europe and Eastern Europe. However, if Europe is divided more regionally, then Italy quickly becomes part of Southern Europe. Western Europe than shrinks to France, Monaco, Switzerland, the UK, and Ireland. (Germany and Benelux are sometimes included if Northern Europe is also split off).
No, Ethiopia is in Africa.
France
Of the European countries, the Western entrance of the Mediterranean is guarded primarily by Spain, but also by the United Kingdom on account of Gibraltar. Morocco also guards the Western entrance to the Mediterranean, but it is not a European country.
Iceland is the westernmost country in Europe. Portugal is the westernmost country on the mainland.
Luxembourg.
That would be Spain.
France is the largest country in western Europe (Ukraine or the European part of Russia are larger) and the largest one in the European Union.
Portugal!