Well since you are new to turkey hunting the best info I can suggest is get out there and watch them, listen to them, and learn by trial and error!!! One very crucial thing to always remember is that a turkey won't do the same thing, they react different every day to a huge variety of variables!

I will try to answer your questions though.........
They usally fly down from roost early after first light, sometimes they gobble on the roost, sometimes they don't. I like to be in the woods way before first light even if I think I know where they are, this way I can sometimes set up accordingly to what I hear in the morning.
I am really big on scouting and TRYING to get some kind of pattern, they usually have a preffered feeding, strutting pattern in the morning.

If I hear them on the roost, I usually do not call to them until they are down, I get comfortable, hope that I am in a spot that they might want to be and then after they are down from roosting I will yelp softly and maybe through in a few cutts, I like to try to feel out the birs personality in how he likes being talked to whether I can see him to watch his actions or tell from his gobbling. Once I find out whether he is interested I might call a lot, a little, or not at all, depending on the feeling I get and how he acts.
To purr on a slate, I make firm football patterns really slow, so the striker kinda skipps along the pattern (hard to describe I guess) kinda like a yelp but slower.

As far as you both getting a shot i have seen it happen if you coordinate it right and you both are "on" the birds.

I wish you luck and just get out there and learn from experience!!!!!!!!!! And have fun without getting disappointed, a botched opportunity is a great learning experience!!!!!(so is a successful one!)