In your .minecraft folder there is a folder called "versions" and in it are the folders containing the .jars for the versions you've played on. Open the 1.7.2 one then the 1.7.2.jar file in there. The very top folder is called "assets" and that is where all the texture files are. You're going to want to extract that folder from the .jar and copy the folder and all that is inside it to whatever folder you're going to make your texture pack in. Open the assets folder, and the minecraft folder in it. You will see 5 other folders. The font, lang, and shaders folders are not necessary unless you want to change the names of items and including them is not the best idea, and makes the final texture pack a large file that takes a while to download. Feel free to go wild with all the stuff in the "textures" folder when making your pack, though! Once you're satisfied with the textures, navigate back to the folder you put the "assets" folder in, and add a text file. Put this in it:
{
"pack": {
"pack_format": 1,
"description": "Whateveryouwanthere"
}
}
and save it as pack.mcmeta then make a 128x128 (or whatever resolution you want) pack.png file which will show up in the texture selection menu in game. Compress the assets folder, the pack.png, and the pack.mcmeta into a zip folder and TA-DAH!!! 1.7.2 texture pack away!

Oh i just forgot, it's copyright under mojang AB...So how will i edit these textures?

Thanks! Okay, So do you know where i can download the default one to edit off, Because i don't wanna edit the textures in my .minecraft i want that to be clean or is the only way is the textures in .minecraft?

Yeah, you just download the default resource pack template, and edit off that