Hi bharatb,
You can post here your doubts and questions that I'll do my best to reply to then.
About documentation we are working on improving the ones we already have for our reference sites.
Considering the Toolset Classifieds you can check the following posts:
http://wpml.org/2014/01/mutilingual-classifieds/
How to Develop Multilingual Classifieds Sites
http://wpml.org/documentation/theme-compatibility/develop-multilingual-classifieds-sites/
Build a WordPress Classifieds Site | How WordPress Classified Sites Work
http://wp-types.com/learn/wordpress-classifieds-site/
Customization Guide for Toolset Classifieds
http://wp-types.com/learn/wordpress-classifieds-site/toolset-classifieds-customization-guide/
Building Marketplace Sites With WooCommerce and Toolset
http://wp-types.com/learn/wordpress-classifieds-site/building-marketplace-sites-with-woocommerce-and-toolset/
Regards,
Ana