Is there a list of file/image field subtokens? Token browser does not show the options for file properties. [node:file-field:0:file:url] gets the url, but is there a list of all file options? Or is there a way to check it from sourcecode somehow?

Gathering the list:


[node:field-image:0:file:url]
[node:field-image:0:file:extension]
[node:field-image:0:file:name]
[node:field-image:0:file:size]
[node:field-image:0:file:mime]
The last thing that is still unknown to me is if there is an option to pull image width and height? If I remember correctly that data is in the db.
For file https://www.drupal.org/node/390482#token-file
https://www.drupal.org/project/imagefield_tokens
and 
add https://www.drupal.org/project/filefield_paths   add this module 
for {The File (Field) Paths module extends the default functionality of Drupal's core File module, Image module and many other File upload modules, by adding the ability to use entity based tokens in destination paths and file names.}  

Check this screenshot: