Fuel is Yellorium, which you mine up. I don't know if you can still run things on blutonium or not, but it has uses in construction of higher tier turbines.
Automation is fairly trivial. When you build the multi-block, you build the ports where you want them. Fuel goes in, power comes out. You can fairly trivially set up an automated shutoff by comparing the internal power reserve with the fuel rods usage, until it shuts down at full power reserve.
Yes, it produces power.
Honestly, the best 'guide' is already found in-game when you try to form the multiblock, so you might want to try that instead of an extremely vague and unclear post asking people to tell you what to do
