Right now it only shows who wrote the last replay, but I want to add at the beginning of the line who created the topic.  

I'm really sorry but this requires custom coding and it depends on different dynamic conditions, this is not a stable color and doesn't have a simple solution. Please note, that we don't provide support for style customization, we may help in 1-2 simple questions related to colors and background but not more. We can not help you customize all components of forum style, these are custom requirements and should be done by forum owners. We only help with general questions and issues.

Thank you for your understanding.

Thanks for getting back to me. Unfortunately, I'm not a developer and my coding knowledge is very limited.

If you could be more specific regarding the code I need to add or change, that would be great.

Thanks.

You should customize the topic.php file /wp-content/plugins/wpforo/wpf-themes/classic/layouts/1/ folder.

The update safe way for changes are described here:

https://wpforo.com/docs/root/forum-themes/theme-customization/

Is it possible to add under the Topic name extra info so it will look like this:

by @User Name x days ago/Date - Last reply by @User Name

The first attached image shows how it looks right now and the second image shows how I want it.

Cheers.