These are such ambiguous questions that it's almost impossible to answer I'm afraid.
For example I pull around 6oz per plant, but I run a DWC setup.i run regs rather than autos so the time it takes to grow depends upon how long I veg them for.
My best advice would be to join a cannabis forum. UK420 is really good for advice but just stay out of the politics on there.
Research, research then research some more. I'm still learning myself after 15 years of growing.
Bury your head in the info and you get a clearer idea of what you can expect from your own setup.
Three things I can tell you is "keep it simple stupid" (ie don't fall for using too many nutes, plant boosting magic liquids etc,), get your environment dialed in, and buy good genetics. I recommend Dinafem, but there are a lot of reputable seed banks out there now.