New Web Site for Publishing Company

We have a web site but I would like to rebuild it on our own server, using CMS so that our staff can go in easily and make changes to text or images. I need a quote, based on the site of sunpenny dot com, for creating a new look and site, with a commercial feel, ecommerce, but otherwise just transferring the data that is already on the site, into the new one. You don't need to produce any content, other than designing the site itself and transferring the information.

PLEASE QUOTE:
(1) How LONG this will take you, and
(2) a TOTAL figure for designing and producing the site, and then giving one of my staff training to use it from the front end.

Please tell me exactly how you will go about this. I need detail please. Thank you.