If by "Zelda Classic" you mean the original Legend of Zelda, you can play it for free at the link I have added.
you can't
You can't. You have to buy the game.
Zelda classic is zelda 1 on nintendo entertainment system
No
You can play Minecraft Classic for free from the Minecraft webpage.
youtube
hai
yes
You can get free Classic Minecraft from the minecraft website, and play the demo version there too for free.
No, but you can play on classic single player and if you have a account you can play on multiplayer classic
Visit the Website of Free Download Media Player Classic and download it from there. it is a compact media player available from its site. the process of downloading is fast and simple.
There is a free version called Minecraft Classic available on the minecraft website.