I am assuming are talking about the gold blocks you mine?
You simply need to put them in the smelting slot (top) in a furnace and power it with something like coal, charcoal, lava buckets, and other things (this is on bottom). You should get gold ingots from it. You can create gold blocks by filling every slot in the crafting table.
If you mean the gold blocks that you make, then put the block in a crafting sqare and out comes 9 gold ingots
You mine it with an iron pickaxe or better I believe.
You get an iron picaxe
Destroy it, then pick it up.
You need at least an iron pick.
iron pickaxe
Unfortunately you can't pick up cake when it has been placed.
You need a Diamond pickaxe to mine Obsidian.
Use a bucket
Mine it using a pickaxe (wood or better), then pick up the drop.
In normal Minecraft there is no such thing as butter. If you mean gold ore then no, you need an iron or diamond pickaxe.
You have to mine it using an Iron pick or better.
you need a mod. example: with the more creatures mod you can pick up rats, mice, and tamed cats.
If you are looking for a way to pick them up, well, you can't pick mob spawners up. You can only destroy them with a pick but it can give you a lot of exp.
Craft a bucket and Right-click on the water with the bucket.