what can keep car from starting after sitting for 9 months its a Z3BMW??

What is your question?

i have a Z3 BMW its been sitting for about 9 months and I'm wondering what little things i can do to get it up and running again.It needed a battery so that has been replaced and I'mthinking i need to top off the fluids ex:anti-freeze,oil,brake fluid gas-treatment,washer fluid(minor),my question is what is ATF/oil and is there a way i can plug in a heater to warm car up over-night and defrost lines? if any are frozen.

What makes this problem better or worse?

when engine is cold

How long has your 2000 BMW Z3 had this problem?

car has been sitting for 9 months and needed new battery got one now