Please, I mistakenly removed the tabshow module that has the 'Find A Doctor' and others. How can I restored it back please?
If you clicked the actual "remove" link on the widget, then the only ways to get it back are to manually re-create it, or reset the whole site with the shaper. Resetting the site would mean losing all progress you've already made, so the best option is probably to just re-create the widget by setting up a second copy of the shaper somewhere else and using it as a reference to copy settings from.
Secondly, I used the Wordpress Add New Post to add a post and published it but it didn't show anywhere, where will my post show please?
On the demo and in the shapers, the default location for the blog posts is under the Pages -> Blog Posts menu item. You can change how and where posts are displayed on the Settings -> Reading page of the admin. If you want the blog content showing on the home page, you will also need to enable the content area on the Content tab of the theme options.
Thirdly, if I use the top row 3 module, how will add new post to the module please.
I'm not exactly sure what your'e asking, but if you're saying you want to change the "Latest Posts" widget, you'll have to do that manually. It's just a text widget with example content, nothing more.