Inserting text into tiny_mce without properties, how to do?

Question

Kohana

Hello.
If you paste text from Word or Excel or copy it from the site and paste it into the bbcode form from tiny_mce, then it inserts text with styles, how to remove it so that the text is inserted without styles.
Also tell me how to make the font bigger? in the form, but when I write it is like 11px. in the form itself, by default, the value is small < I would like to do it like on the site 14px.
I have a settings file:
settings.js
in the file there is this:

tinyMCE.init({
      mode : "exact",
      elements : "ajaxfilemanager1, ajaxfilemanager2, ajaxfilemanager3, ajaxfilemanager4, ajaxfilemanager5, ajaxfilemanager6, ajaxfilemanager7, ajaxfilemanager8, ajaxfilemanager9, ajaxfilemanager10, ajaxfilemanager11, ajaxfilemanager12, ajaxfilemanager13, ajaxfilemanager14, ajaxfilemanager15",
      theme : "advanced",
      plugins : "advimage,advlink,media,contextmenu,table,fullscreen",
      theme_advanced_buttons1_add_before : "newdocument,separator",
      theme_advanced_buttons1_add : "fontselect,fontsizeselect",
      theme_advanced_buttons2_add : "tablecontrols,separator,forecolor,backcolor,liststyle",
      theme_advanced_buttons2_add_before: "cut,copy,separator,",
      theme_advanced_buttons3_add_before : "",
      theme_advanced_buttons3_add : "media,fullscreen",
      theme_advanced_toolbar_location : "top",
      theme_advanced_toolbar_align : "left",
      extended_valid_elements : "hr[class|width|size|noshade]",
      file_browser_callback : "ajaxfilemanager",
      paste_use_dialog : false,
      theme_advanced_resizing : true,
      theme_advanced_resize_horizontal : true,
      apply_source_formatting : true,
      force_br_newlines : true,
      relative_urls : false,
    force_p_newlines : true,
    forced_root_block : false
    });

    function ajaxfilemanager(field_name, url, type, win) {
      var ajaxfilemanagerurl = "../../../../jscripts/tiny_mce/plugins/ajaxfilemanager/ajaxfilemanager.php";
      var view = 'detail';
      switch (type) {
        case "image":
        view = 'thumbnail';
          break;
        case "media":
          break;
        case "flash": 
          break;
        case "file":
          break;
        default:
          return false;
      }
            tinyMCE.activeEditor.windowManager.open({
                url: "../../../../jscripts/tiny_mce/plugins/ajaxfilemanager/ajaxfilemanager.php?view=" + view,
                width: 820,
                height: 640,
                inline : "yes",
                close_previous : "no"
            },{
                window : win,
                input : field_name
            });