combox retrofit bmw e82 5 questions help

[cometman]

hello i am a bit confused about retrofitting the combox to my e82. please help me out.

but first small intro of my car

-E82 08/2009 (vin number WBAUR51020VJ70475)
-From Factory came with CIC professional idrive system large screen
-usb/aux in armrest and usb in glove compartment
-BT for hands free calling and contacts acess only
-SOS button (dont care about this since i believe it doesnt work in my -country)
-bmw services (but doesnt seem to work)
-Logic 7 HK retrofitted

From what i can see in the boot i have mulf2+tcu

my objective is to fit a combox Bn2000 to my e82 so i can have:
-BT audio streaming
-multiple phones paired over BT
-album art when playing music
-spotify integration if possible

1-i have found a cheap combox bn2000 from a 2010 e81, not sure if this part is correct for my car. the sticker reads 8410924817901 part number will it work on my e82 after coding?

2-this is the part i am very confused, i believed that the combox replaced both tcu+mulf2 module present on my car.
i have read that it only replaces the mulf2 nothing else. does the tcu remains?

3- i found some adapter harnesses for plug&play for a combox retrofit but dont know if i need to buy the one only for mulf only or the one mulf+tcu. BT cable extension needed? most bypass? please help me here

4-is it possible to get bmw apps to work like spotify, thats the only one that matters for me.

5-and in the coding department what options will i have to activate so the wanted options work?