What parts do I need for steering?

I don't want to discourage your efforts but I must say you have chosen an extremely difficult path. Even seasoned professionals have a difficult time putting things back together when they lack the memory of having taken them apart. In addition, you will find the cost of completing the project very high. Purchasing individual components is very expensive. There's just a lot of 'stuff' that goes into a car. I'd recommend you try to find a complete car to start with. Just my $.02 for what its worth.