Updating from lich king to pandaria

Hello guys, I just want to know if ill downlod pandaria version I will still can login in my acc from lich king and have same level etc? thanks

I'm not sure exactly what you're asking, but updating your client from Wrath of the Lich King to Mists of Pandaria would prove to be much more difficult and take longer than just downloading a fresh Mists of Pandaria client. Additionally, you cannot play characters that are on the Wrath of the Lich King realms on Mists of Pandaria.