It fully depends on what is your level of strength and fitness. One crucial pt you left out is the weight that you'll be lifting.
I feel that you are asking a question too general and it will take all day to spell out everything to you.
We can't tell you how much to do or what to do without knowing anything. For a beginner though, I would recommend going lighter and concentrating on getting the right lifting technique for all the exercises you'll be working on.
About muscle group, it's pretty much individual, some train a lot of their pecs and pump their lower limbs less. Very subjective and opinions can realy vary.