Yes, as both countries are a part of the Schengen Area.
I think it means the first Schengen Area country you will enter.
Yes. Belgium and Greece are both Schengen countries.
If you have a Schengen Visa, you do not need a Visa to enter Switzerland. But, just make sure that you have this written "Schengen Estate" on the visa. It means that all Schengen countries are included in the visa. Anyway, once you enter Europe, nobody asks you about your visa or passport.
Brussels is a city, not a state. Brussels is the capital of Belgium. Belgium is a member of the Schengen Area.
Yes, provided that you enter Italy as your first Schengen country, and then travel to France without leaving the Schengen Area. If you need a Schengen Visa it applies for all Schengen countries, this means that you can then travel freely within the Schengen area as long as your visa remains valid.
Yes.If you need a Schengen Visa it applies for all Schengen countries, this means that you can then travel freely within the Schengen area as long as your visa remains valid.
No, a single entry Schengen visa allows you to enter the Schengen area once and visit multiple countries during that visit. If you plan to leave and re-enter the Schengen area, you will need a multiple entry visa.
Yes, with Schengen visa you can enter in Croatia.
No, a single-entry visa only allows you to enter the Schengen area once. If you leave, you will need a new visa to re-enter.
No, individuals with a Schengen visa cannot enter the UK. The UK is not part of the Schengen Area, so a separate visa is required to enter the UK.
Once you are inside the EU (Schengen) you do not need visa to travel within the 27 countries.