Rims can be re painted or buffed.
To clean the rear lights remove them and use a heat gun to detach the lens.
After that wash them clean and paint the inner dome white or silver.
Close the lenses and seal them properly using good quality silicon.
You can use silver foil or add a corner bulb for better light.
As far as the security alarm/keyless entry is concerned then Steelmate or PLC are good.
Dont know about their availibility or price in Karachi but they are cheap and durable.