Dear yeri,
About Tiny MCE dissapear when create article on frontend, please go to Template Manager and please disable 'Merge file', 'Compress css' and 'Compress js'.
About the second image, please go to your_site\libraries\cms\form\field\media.php and find:
// The button.
if ($this->element['disabled'] != true)
{
JHtml::_('bootstrap.tooltip');
$html[] = '<a class="modal btn" title="' . JText::_('JLIB_FORM_BUTTON_SELECT') . '" href="'
. ($this->element['readonly'] ? ''
: ($link ? $link
: 'index.php?option=com_media&view=images&tmpl=component&asset=' . $asset . '&author='
. $this->form->getValue($authorField)) . '&fieldid=' . $this->id . '&folder=' . $folder) . '"'
. ' rel="{handler: \'iframe\', size: {x: 800, y: 500}}">';
$html[] = JText::_('JLIB_FORM_BUTTON_SELECT') . '</a><a class="btn hasTooltip" title="' . JText::_('JLIB_FORM_BUTTON_CLEAR') . '" href="#" onclick="';
$html[] = 'jInsertFieldValue(\'\', \'' . $this->id . '\');';
$html[] = 'return false;';
$html[] = '">';
$html[] = '<i class="icon-remove"></i></a>';
}
Please rename class 'modal' in <a> tag:
<a class="modal btn" title="' . JText::_('JLIB_FORM_BUTTON_SELECT')
=>
<a class="modal1 btn" title="' . JText::_('JLIB_FORM_BUTTON_SELECT')
Thanks