1. I do not believe it has the same driveline. The drivetrain (motor, transmission, transfer case, front and rear axles) are the same, but the driveline is probably longer.
2. Yes, those items should fit.
3. I have also heard that a 2" body lift is much more PITA than a 1" in all Suzuki's. There is a large variation between individual vehicles of the same model as to what it will take to fit bigger tires, mostly due to spring fatique, You can get new heavy duty or longer springs (OME has some) that can increase your lift or, you can go with spring spacers that put a spacer between the top of the spring and the body.
I would say it is best drive and enjoy your new vehicle beffore modifying it. They are pretty capable vehicles, even in stock form. A little back roading, or off roading, will point out where you need improvements. When you go to larger tires, you will notice a loss of power. Depending on years, there is not many variations in gear ratio's that fit the rear differential to allow you to increase the gear ratio and regain some of the lost power (there are more variations for the front, but both need to be the same).
You will find That every modification begets another modification.
