Volume for videos & music are in purple.
Ringtones in blue. Click on the "Ringing" it will appear. You can either slide it with your finger or use the buttons at the side.

Vibration, Touchscreen Vibration can be changed up to level 3 max. I find the vibration strong, can feel it in my pocket everytime an update or sms,etc comes.
Ringtone depends on the tune used, I dont put it on max anyway, use vibrate more. I also have the "Dolby Sound" enabled for both music & video.