3.0si maintenance intervals

[Ponta]

Yes hello,
I would like to ask for help people far smarter than myself
03/2006 make, milage for today is 62500 km ~ 39000 miles. Manual transmission.
Previous owner was not running the service book. He visited dealership only once (first oil service after 2 years of owning a new car) in 8 years of owning the car. The rest was not registered in the official maintenance book. Thus today I can only imagine what has been done.
I have only one stamp from 2009 and it stands for oil service. First and only.
Second owner bought car in 2015 and did oil service by himself and I bought the car on 10/2016 and made oilservice on 05/2017.
There has been brake fluid change in 2009, manual says clearly that the production date counts (2006) not first registration (2007). I do not know why the dealer made it in 2009.
From what I have read it goes like this:
15k miles or 2 years - Oil service (2008 for me, but it has been done in 2009)
30k miles or 2 years - Inspection I (2010 for me)
45k miles or 2 years - Oil service (2012 for me)
60k miles or 2 years - Inspection II (2014 for me)
75k miles or 2 years - Oil service (2016 for me)
90k miles or 2 years - Inspection I (2018 for me)
etc...
I have changed the following on 05/2017:
-oil
-oil filter
-air filter
-cabin air filter
BUT I heard it is recommended by BMW to change every 2 years:
-brake fluid
-transmission fluid
-spark plugs? when?
I do not know when or if previous owners have done that.
My question is what should I change and when because I have a headache. What capacity of those fluids should I buy, also I do not know when and if previous owner changed spark plugs, should I consider doing this aswell?
Thank you so much. Please respond.

[dc_wright]

I generally follow MIke Miller's lifetime maintenance guide. See copy attached.