Well, just installing Dolphin which got Baloo with it did the job.
I just finished indexing all my files and searching for fie content with dolphin is working perfectly.
And XFCE seems OK with me. I don’t need all the fancy stuff of KDE, especially XFCE seems faster and lighter than KDE. (Though I lived on KDE -and loved- all the time and XFCE just 36 hours ago!)
I’m going to uninstall catfish and the gnome-search-tool as they are not working. Just to be sure they won’t be trying to index and putting some load on my processor or memory.