Help Needed Regarding Installation Of Downlights

Hi I am completely clueless about renovation and their relevant contacts. After much struggles, I finally found the perfect flat led panel downlights I like, they are great as they are only about 1.5 cm thick. But now I do not know who to approach to do up the false ceiling and all the electrical things. Usually does the electrician do up the false ceiling as well or I need get someone to do up the false ceiling before finding him? And also, I also do not know if I need false ceiling. I know usually one need false ciling for installing downlights? but mine is the new bto where the wiring is all concealed up? The ceiling looks sort of like a false ceiling to me, esp. I realised how low it is?

Or is that a real ceiling and I still need a false ceiling?

If the electrician is not going to do up the false ceiling, can anyone give me a reliable contact for the false ceiling? Has to be really reliable. =(

And also, my main concern, how much does it cost usually to do up the false ceiling for a 3 room bto ( whole house; living area, kitchen, 2 bedrooms and even 2 bathrooms ), then plus the electrician's charges for installing all my 26 flat panel downlights? Someone please help me asap. I need do up my ceiling and lights asap.
Thanks. =(