Not sure why you can't. Might try using the new Battle.net installer to get started playing.
you cant get Pokemon in world of warcraft
If you can not use CD's in your computer, then you can download the game from the official website and install it that way.
If you do not have the install disc for World of Warcraft, then yes, you have to download it and let it update to the current version.
you buy the expansion set and install it.
When World of Warcraft is installed, it asks you if you want to install Direct X.(only if you currently have a previous version)
You cant dude, sorry
You will need approximately 15 Gigabytes (GB) to install World of Warcraft.
because you cant afford to play
You cant get free World of Warcraft forever but you can have a 10-day free trial, but after that its about £10 a month onwards.
This is not possible, the original (classic) World of Warcraft must be installed first as the Burning Crusade is an expansion (addon). You can download the installers from the World of Warcraft website.
You cant
Only if you want to create a dranei or blood elf, level past 60(70Max.), or go to the outland. Burning Crusade Is An Expansion For World of Warcraft.