First, your time scale is completely unrealistic, unless you intend to pay lots, and I do mean lots.
There is no off-the-shelf solution to do this, so it is all custom code and development. Don't even bother with Muse, though your initial layout ideas could be done using Adobe XD -
http://www.adobe.com/uk/products/experience-design.html?sdid=19SCDRPP&mv=search&s_kwcid=AL!3085!3!183347083847!e!!g!!adobe%20xd&ef_id=WNKawwAAAVDNsM63:20170322153947:s
But you could not use the code generated in actual production. You will require Photoshop and Illustrator for images and illustrations, (these are the industry recognized professional programs for such work).
As for the rest, you will have to decide exactly what features you require the site to implement, and how they should work, before I can give any real advice, but do NOT use Muse or Adobe Animate, for corporate quality sites.
Your first objective though would be to actually create a list of objectives, quality, functionality, features, usability and exit criteria, this is often called a 'design brief' though when it comes to the web the normal 'design brief' is too limiting This is normally done as a team effort, and involves talking to those you consider to be a typical user profile, (which you also have to define). Don't expect anyone to even look at the project until this is done.
Also don't forget to plan for the future, and decide now how the sites(s) will be updated and improved, (modular construction vs all-in-one-go construction) as anything corporate style, will be an ongoing project for years. Not a build and forget for a few years.