You can't create application without being authorized developer which require either providing Facebook with your mobile phone or credit card.
Answer to the question you stated as similar is perfectly fits here too...
As for the other developers that need to work on your app you can add them with role Developer/Beta Tester based on your needs (and not Admin) in Developer Application and carefully choosing only persons you trust have permissions to modify your application settings. Once Developers/Beta-Testers finish the work you should remove 'em.
