Add Image Button Missing In New Post Area

I lost my media upload buttons!
No, they were just consolidated into one. You can upload all media types via the one button.

http://wordpress.org/support/topic/troubleshooting-wordpress-33-master-list

images are not showing up

Check your uploads path in Settings -> Media. In most installs, this field should remain blank.

can’t edit the sizes

And how exactly are you trying to edit the images sizes?

Have you tried:

– deactivating all plugins to see if this resolves the problem. If this works, re-activate the plugins one by one until you find the problematic plugin(s).

– switching to the Twenty Eleven theme to rule out any theme-specific problems.

– resetting the plugins folder by FTP or PhpMyAdmin. Sometimes, an apparently inactive plugin can still cause problems.

– re-uploading the wp-admin and wp-includes folders from a fresh download of WordPress.

Then reset the plugin’s folder. If you have problems doing that, contact your hosts for assistance. You may have a folder ownership issue.

Have you checked the uploads path in settings -> Media. Have you checked, via FTP, to see if the images are being uploaded correctly?

Pardon? Can you use FTP?

You are just checking to see if the images have been uploaded to the correct uploads folder.