6 months or so and I would put the battery on a trickle charge. 2 years and I would just disconnect it and bring a good battery with you when you pick up the car. As for fluids, oils and coolant should be okay. Is the car going to be stored in a wet or dry environment? If wet, fill tank with gas, add stabil, and hope for the best. If dry, add stabil, run car until almost out of gas, and bring fresh gas to pick up car. As for rubber things, get the car off of the ground so tires don't go out of round. Belts and hoses could get some kind of treatment, but I don't know what.
Now for other side of coin. Is car paid off? If so, sell it, put money into interest bearing account, and replace car when you get back. You will have money to spare. The same car will be cheaper to buy in 2 years than you can get for it now.
Now you must ask yourself, do I love this car? If so, keep it. It's a fozzy, so I would keep it.