[QUOTE=pranayshedge;1046288]Which all programming languages do I need to learn to become a webmaster?[/QUOTE]
There's a lot of different web languages to consider, and depends on what type of development you're interested in pursueing... I don't think there's some "definitive list" as such that applies to every person, so I would recommend that you conduct some personal research to firstly identify your interests and requirements. I would start with learning HTML first and how to use CSS (style sheets), accompanied with a server-side language such as PHP or ASP, then I would learn how to use the server-side language with a database like SQL Server or MySQL. You can build any site based a combination of those languages. Alternatively, instead of literally coding every page, you could install a CMS (Content Management Site) where the entire site is maintained and managed via modules, plug-ins, and components that you can install and configure relatively easily.
I hope this helps somewhat.