1) Appearance > Theme Options > General Settings : Logo Text
2) Please send your question and wp-admin(url/user/pass) via
my profile contact form (you need login on ThemeForest), I’ll log in to check it.
3) Did you mean the image is for clip text like: http://themes.uiueux.com/air/
It is a slider(text). You should find and edit it in BM Slider