To make a texture pack, you're gonna need a program like photoshop, paint.NET, or GIMP. Regular Paint WILL NOT work, for it doesn't allow transparency. But when you get a program like that, so you have one if you mess up, copy and paste an original terrain.png to somewhere. Then open up the terrain.png and edit the blocks to what you want them to look like. Save, and place it where the original was, and it should work.

(Note: You must be a member on World of Minecraft:Realms to do this)
First, goto womrealms.com and log in. On the main page after login, scroll down till you see stuff about textures. Where it says upload a new texture, Select Texture Terrain or Terrain Image (dont remember exactly what it says, but has something about texture or terrain) then Browse your folders and select the texture pack you want. Click the Upload button then name it whatever you like (grayscale, hi-def, pixel, potato, etc). It should say uploaded successfully. Then scroll up a bit and click the Silver Edit button next to your realm (where you normally go to rank and everything). Scroll down to your world list on the site and click on the Set Theme button. Choose the texture you named in the new menu called Texture and remember to check the box next to it. Click the save button at the bottom of the yellow menu. Then either goto your realm or just reload it and TADA!!! Texture :D
(Yea kinda long i know, sorry :p)
<3 Deadly

I want to be able in classic to get snow, gold ore and redstone how do i do that ?