It is said Nine. yes nine as our number nine in America. Nine. Edit: It is spelled nein ;) but the other person is correct you say it like the English word nine
Gerade ich bin
Nur ein scherz means just kidding.
je regarde simplement, je ne fais que regarder (these are the standard answers you do in shops when the saleswoman is asking you if you need any help)
Just a minute is einen Augenblick in German.