Missing icons with CKEditor for Drupal 7
Try re-upping the CKeditor library (not the module) and double-check that the owner/file permissions are set correctly on the server. 

I believe TinyMCE also works with CKeditor. If you only need to attach images to content and don't need a WYSIWIG editor for your input area, you can add an Image or File field to the content type. If you're using a File field, you might also want to look up the File Entity and Media modules.