Not in the current Vanilla (Minecraft without Mods) Minecraft, no. But their are a few Mods out there that will make that possible.
Not without mods.
Post your ideas on the Minecraft Forums. There is a thread there for mod ideas
Without mods, you can't.
you can get mods off websites like minecaft mods that no one uploads viruses to because they would get caught and banned in seconds, i reccomed minecraft mods.
There is no brass in MineCraft without mods.
TNT without mods. With mods, the hydrogen bomb.
you cant without mods
Yup.
you can get minecraft mods and textures off the minecraft mods website.
You cannot make a hang glider in Minecraft without mods.
No, you can't.