2010/2/3 Herulee heramb.forums@googlemail.com:
Hello,
Is it possible to change a specific section of existing page using API?
Use the section parameter, see http://www.mediawiki.org/wiki/API:Edit_-_Create%26Edit_pages#Parameters . The section parameter is the number of the section to edit; if you need a TOC to decide on this number, you can grab one with action=parse, see http://www.mediawiki.org/wiki/API:Expanding_templates_and_rendering#parse .
Having a separate TOC automatically generated for images or tables is not possible with MediaWiki core: you'll need to maintain one by hand or find/write an extension for it.
Roan Kattouw (Catrope)