Give it time, it will come. Just don't change anything on your page structure besides adding new content.

Sitelinks and Breadcrumbs appear on the serps whenever they please. It's best to not worry about them too much.

Site links does not appear immediately i believe it takes some time for it to be actually be evident.

Actually, webmasters have very less control over sitelinks... You can just set you sitelinks in Google Webmaster Tools.

When Google thinks your backlinks are important for the user, it will display them in search results.