"à tous mes amis" = "to all my friends"
C'est pour tous mes amis > this is for all my friends (all boys or a mixed group) C'est pour toutes mes amies > this is for all my friends (they're all girls)
mes amis - my friends
J'aime tous mes amis de Facebook.
Voir mes amis means 'to see my friends' in French.
to all my friends, I thank you very much
'mes amis' are called 'my friends' in English.
"mes amis pour la vie" means "my friends for life".
"Mes amis" contains a pronoun already: "mes" is a possessive pronoun, meaning "my".
This translates literally as 'The friends of my friends are my friends'. In good English 'My friends' friends are my friends also'.
"With my friends."
Bonne nuit, mes amis - Good night my friends