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
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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.
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!