Is this possible for the Timline activity to show title of photo and or thumbnail ?
Design and Skin Customization
Could be, try throwing a {debug} into the item_action.tpl for the module your after. That will give you what is available for in that template.
On the left you will see the variable name, it will be like {$item} and on the right are all the things that you can output, they will look like item_name => "something ehere". That means if you put {$item.item_name} in your template you will get the output of "something ehere" when viewed in the browser.
"{debug}"
http://www.jamroom.net/the-jamroom-network/documentation/development/1477/debug
You can use those variables to structure whatever output you like.