le toolbar sono settate di default in ckeditor.js.
in alternativa puoi costruirtela te.
ti posto la mia così ti fai un'idea:
codice:
                    <textarea cols="" rows="" id="testo_articolo" name="testo">
                    </textarea>
                    <script type="text/javascript">
                        CKEDITOR.replace(
                        'testo_articolo',
                        {
                            toolbar : [{
                                    name:'document',
                                    items:['Source','-','DocProps','Preview','Print','-','Templates']
                                },{
                                    name:'clipboard',
                                    items:['Cut','Copy','Paste','PasteText','PasteFromWord','-','Undo','Redo']
                                },{
                                    name:'editing',
                                    items:['Find','Replace','-','SelectAll','-','SpellChecker','Scayt']
                                },{
                                    name:'forms',
                                    items:['Form','Checkbox','Radio','TextField','Textarea','Select','Button','ImageButton','HiddenField']
                                },'/',{
                                    name:'basicstyles',
                                    items:['Bold','Italic','Underline','Strike','Subscript','Superscript','-','RemoveFormat']
                                },{
                                    name:'paragraph',
                                    items:['NumberedList','BulletedList','-','Outdent','Indent','-','Blockquote','CreateDiv','-','JustifyLeft','JustifyCenter','JustifyRight','JustifyBlock','-','BidiLtr','BidiRtl']
                                },{
                                    name:'links',
                                    items:['Link','Unlink','Anchor']
                                },{
                                    name:'insert',
                                    items:['Image','Flash','Table','HorizontalRule','SpecialChar']
                                },'/',{
                                    name:'styles',
                                    items:['Format','FontSize']
                                },{
                                    name:'tools',
                                    items:['Maximize','ShowBlocks']
                                }],
                            language : 'it',
                        }
                    );
                    </script>