Start here. There are tutorials on HTML(the structure of the document or application), CSS(styling of the structure), and JavaScript (programming language, used to interact with the page).
If you don't know a term search on MDN, and you should be able to find whatever you need.
You will need to download a text editor, this will make it easier to write code by auto-completing, syntax highlighting, and other helpful features.
I recommend https://atom.io/ or http://www.sublimetext.com/
https://www.mozilla.org/en-US/firefox/
create an account on http://github.com/. We will go over what GIT is and why we want it. We will also use github to review your code and publish static websites for free.
Stack overflow is a place where you can ask questions and get answers about programming. It's a great resource to find commonly asked questions and mutliple solutions. Search here when you have an issue