I want to ask that can i use an html template purchased from CodeCanyon and use in my own product which will be a full fledged application.
No, you can’t without the written permission from the html author.
with written, Which license is required ? Regular or Extended license ?
if it is version product (mean html version to another product version) then will need author collaboration (envato has a form to apply for author collaboration to get permission). If the html is a part of your application then will need extended license and permission from the html author. contact html author, they will assist you.