Help with facebook privacy?

[Bree H]

On facebook when I am in privacy, then search. "Use this setting below to control who on Facebook can find you through search. Your Friends will always be able to find you." Does that mean when I check off only friends, that people who are my friends are the only ones who can see my listing on facebook if they look up my name? Nobody else can see me if they look me up? But, when I leave messages on my friends pages, can their friends see my wall posts and such even though they are not my friend?
Second question, when I go to privacy again and profile and the first section called profile, if I click only friends, does that mean only my friends can see my wallposts and such, people who are not my friend and look on my friends pages will not be able to see anything I have written down? If I check off everyone, does that mean anybody on my friends pages can see what I have written?
Sorry if this is too much but please explain well for me. Thank you.

[Desirea ♥♥]

ya only friends can see and other friends can see your message but they can't write or answer to it if there not your friends.
and ya only your friends can see certain things it wont let other people who aren't your friends look at what you wrote!