Creating a Clickable Table of Contents (TOC) in Blogger is really a pain in the anus! :/ On the other hand, in WordPress, you can simply install Table of Contents Plus plugin easily and you won't even need to mess with any code. It does everything for you!
Well, we can't compete with WordPress. Blogger is WAY more complicated to tweak. We have to visit Template Editor or Code Editor in our posts even to add a little something like this Table of Contents that we can click to jump to a specific part of that same page.