How to get a minecraft gift code?

I have been playing Minecraft for about 2 years and I really love it. But I'm not able to get the latest update or change my skin from the default. If anyone could send me a gift code or show me how to get one for free it would be greatly appreciated

Nothing is free on this earth.

To get one for free, knock on 90 foors and ask for a dollar, hope 1/3 will say yes