Staff will be helping you with your CSS editing but you have some questions that are not custom design related.
The menu bar as shown in the picture
Custom menus > http://en.support.wordpress.com/menus/
Creating static page is the same in any WordPress.com blog no matter what the theme is. Pages are static. They sit outside of the blog structure and you cannot post to multiple pages in any blog. There is only one main page for posts in a blog and all posts will show on the main blog page. There is no way to exclude posts from the main posts (blog) page.
What’s critical is:
(1) a clear comprehension of the differences between pages and posts > http://en.support.wordpress.com/post-vs-page/
(2) a clear comprehension of the fact that there is only one dynamic page in a blog for posts and we cannot post to more than that one page. But we can create the appearance that we have posted to more than one page. We organize posts by assigning categories to them and you can create a custom menu and add the categories into the custom menu.
A custom menu allows you to display Categories with drop-downs to sub-categories in tabs along the horizontal navigation where normally only Pages tabs are displayed. If you wish you can also include Pages with drop-downs to sub-pages and/or Tags pages and/or Custom Links in your custom menu as well. You are in charge of what appears in a custom menu. You choose the order in which to display any and/or all the foregoing in your custom menu. You choose which to display and which to hide.
(3) If you do not want all the posts to show on the front page, then you can create a static front page for your site. Choice 1 static front page.
Choice 2 running page for all posts on front page.
Which do you choose? It’s one or the other.
If you choose Choice 1 static front page then you have to create two pages. One for the static front page which you can call anything you choose example “Welcome”, and one for the blog posts to appear on which you can call anything you choose example “Blog”. After your do that you go here > Settings > Reading and make the designation change and click “save changes”. http://en.support.wordpress.com/pages/front-page/
Forever front page slider
The slider works very well as I have used it myself. For Featuring posts in a slider on your home page you need sticky posts with Featured Images. Every sticky post you have (up to 10) that has a Featured Image (at least 887 pixels wide) attached will show up there.
sticky posts > http://en.support.wordpress.com/posts/post-visibility/#sticky-posts
setting a featured image > http://en.support.wordpress.com/featured-images/#setting-a-featured-image
Hope this helps.