if together with MoP how much altogether ?

just buy thru blizzard store , just top ur mol acc (mol points can be bought thru 7-eleven) then buy from there less hassle
i'm thinking of joining soon but these few months budget is a bit tight , maybe i just but the battle chest 1st then when reaching lv 85 then can consider joining MoP

use https://www.mol.com/my/Default.aspx

1) create an account in mol
2) top up mol point in 7 eleven
3) create a Battlenet account
4) go to Battlenet shop
5) click world of warcraft games section buy both packs in the game section usd 19.99 x 2 = rm 135+/- (Source
6) select mol as payment option
7) purchase
8) Tadaa !! ur in the game

before you start playing i suggest find out which server u likely join and find a lyn guild in certain realms they can Refer a Friend with u can level even faster. GLHF

if u like to purchase anything from blizzard without credit/debit card plz use the above method