You are going to need a lot of blocks for this build so you should better get to farming. As for the blocks themselves, you can pretty much use anything. Cobblestone and Wood are the most common ...
There are two Minecraft mob farms that are commonly built in the early game. The first is a general mob farm, which can produce any hostile mobs that spawn in the night. The other and more efficient ...
You can tame a fox in "Minecraft" by breeding two wild foxes, which can be done by enclosing them in a pen and feeding them ...