Outlaw rogue doesn't exist in MoP. That spec was introduced in a later expansion.
I recommend, at a very basic level, these addons:
Bartender4 (must have imo to organize your actionbars)
Bagnon (improved iventory experience, without being too much out of line of the blizz asthetic)
npcscan (as rafeal added in his list, maks it really easy to kill pandaria rares, without even knowing they were close.)
tomtom (for the waypoints you often see on wowhead)
Gathermate2 (if you care about gathering professions)
My advice would be to make a character, get lvl 90 and go straight to the timeless isle to get itemlvl 535+