1. Ixora and emerald  are actually okay. But of course it depends on your definition  of 'that bad'. Landed rooms are generally cheaper
2. Parking spot inside the campus itself is limited. There are ample space outside but not under mmu. There are taxis  waiting outside the gate but taxi fares maybe a hindrance
3. Gym and tennis court yes.

MUET result no longer expire in MMU, if you give them a copy of your result to them, they key in into system it will valid until you graduate.

yo.... my experience:
i stayed before here so i am quite familiar
Emerald Park (male block): RM180(earlybird), RM210(normal) -- 2 years ago price (cheapest i think)
#include utilities XDDDDD (water and electricity only)
pros: si beh near to MMU, mmu corner and etc.
cons: shared with utem, not many washing machine available (rm2.5/wash)

Ixora: price range around 260-300++ for shared room, i am not really sure about this already
pros: last time got beautiful swimming pool
cons: now swimming pool macam buaya pool, too much complain, it seems that UTEM move to block C in ixora

BBP: a little bit far from MMU, approx 5minutes walk to Ixora / MMU backgate (field), not owned by any management like ixora or EP, usually deal directly with owner
#small swimming pool
#required access card

BBU: 10minutes++ walk, price quite cheap lah, but the distance , seriously no for me

Taman Dahlia: recommend u move together with your fren after 1 year of studies
Taman Kerjasama: slightly safer than taman Dahlia

i dunoe what to write anymore )

*i would recommend you to go for ixora / emerald park for your first visit.
i am not sure about this, but sometimes u are able to meet all freshie in the same house and that's when u are able to meet more friends XD....
once you moved into a landed house, usually all of them live in their own world )