You need a stone pickaxe or better to mine iron ore/block.
To get diamond, you need a pickaxe of iron, gold or diamond.
Try wooden tools if haven't tried those! If that doesn't help I don't know what to tell you bro!
A diamond tool has 1562 uses before it breaks.
Yes, they behave the same way they do in the computer version of Minecraft.
On the crafting table, go to the tools section.
Diamond Armor, Diamond Tools, other stuff like Jukeboxes. The rarest material of all.. diamonds. You find some, you should be happy Diamond is the highest tier in UNMODDED minecraft. See DIAMOND.
Yes, but it takes a lot of damage for them to be destroyed.
Go to the tools section while on the crafting table.
Gold swords and tools last 33 uses (mob hits) so the answer is 33. However, if you use the sword for digging blocks it gets used twice as fast.
Go to the tools section on the crafting table and press the sword.
Minecraft: Pocket Edition was just recently released. As such, there aren't many features available. At this time, there is a creative mode and a survival mode, yet the only differences are a health bar in survival and some mobs (zombies and sheep right now). There are doors and basic building blocks, but most of the redstone items have not been added yet. There are tools, yet there isn't a crafting system as of yet. At the moment, Pocket Edition is still a very basic form of Minecraft. Over the next few months, Notch and Jeb will be adding features to the game to flesh it out and make it more like Survival Mode. Right now, the most you can do is build and occasionally fight zombies.