Im sorry Im pretty horrible at everything but after a long time I can master anything but usually longer then most people.
Then again I do things 99% of the world never trys.
Maybe try starting with the Emerson Lake and Palmer Trilogy patch in the PDF below? (I’m hoping this patch is for the main lead sound ) If that one is close try adjusting it until it works (maybe change a square wave to a triangle etc?) Make sure to process the sound through a delay and/or reverb effect. http://www.synthzone.com/midi/moog/minimoog/MINIMOOG%20PATCH%20BOOK.pdf
My first thought was maybe two triangle waves but with the filter ‘trick’ of feeding the output back into the aux input. Maybe other’s here with more seat time at a minimoog can help and/or add to/correct my suggestions.
To get back to your initial question of how to get that lead tone, well, you need a PA speaker system (that distorts ever so slightly), then you need a Tape Echo machine, then you also need a church for the natural reverb, and then simply use a square or pulse waveform.