Is there any Example for download on explaining how to make a roguelike game ?
all it needs is Grid movement - level ups - enemys - items - random dungeons
So how to learn all that stuff ! :P
A good place to start is just doing some tutorials, even if it doesn't benefit your game directly, you'll learn a lot of useful stuff. Some of the things you mentioned can be found in the FAQ thread in this subforum. It's always good to get a good overview of the basics before attempting something more complicated like inventory and random dungeons.
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Tutorials, Manual, etc... the normal stuff. No matter what type of game you want to make, the first step is getting good with the tools. Welcome to the community!