I want to learn how to code webpages what languages do i need to know?

It totally depends on what you wanna do. If you want to build/extend CMS systems or if you only want to put out single HTML webpages. The overview from kadreyalta is genius ??
If you're new to the game and want to be able to create something for yourself and small clients - learn Wordpress (html, css, php) and you'll be set.