I mean do all the controls work the exact same in making the planes do the same things?
yes
Also, when you get the G2 and it has a transmitter how many channels is that transmitter that comes with the sim?
like 6 or 7 but there a a ton of parameters on the program for your own tx
Will it react as my actual transmitter I would use for real flying?
yes its the same thing only it doesnt transmit.
Can you hook up your real plane transmitter to a simulator i.e. G2? If so will the G2 be able to use all different kinds of transmitters i.e. futaba, JR, etc?
yes it comes with the cords to do so.