How do I export all content from Blogs to Pages?

It’s not possible without someone coding a custom converter or doing it all manually. 

But IPS has already indicated that their apps will come closer together in the 5.x product line. So, maybe if you wait, IPS will make that happen in the future. 

I'm waiting too for information about closer collaboration between Blogs and Pages.

But @Adriano Faria wrote that he may have a converter.