Visual Studio Code is pretty much the industry standard these days amd should be on your list. I've heard of Brackets, Atom and of course notepad++, all respectable text editors, nothing you can do wrong here. More on reddit.com

In order to learn the code itself and not how to use a program that fills all that in for you, I’d suggest something like notepad++, there are of course many free programs that can do this for example brackets, sublime or atom, but they all offer suggested code and for a learner, that will probably slow the learning process. More on reddit.com

It's been a long time since I did, but I used both TinyMCE and CoffeeCup, preferring the latter

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As an editor, i would reccomend Visual Studio Code, it's free, it's great and nice to newcomers. No, you don't need no hosting, you will host in local until you got a real project, and then you will still use local for testing, probably. For example in Visual Studio Code(VSC) i would reccomend the extension Live Server, that way you just need to run live server with a simple html file and it will open locally. Later on you might need to run a local host with a database, that is harder and you will need a program like WAMP. Side Note: W3schools is fine for learning, but it can be outdated, if you want more information or think maybe something is wrong, ask in reddit or check mdn . More on reddit.com