If it's a basic ride, it might be a good idea to sell it on, as when you return it will be near 12 years old.......
But, if it is looked at as family, pump up the tyres to around 40 psi, cut up some cardboard boxes to shield the tyres, other than that I would not worry as it will be started now and again. A battery milliamp trickle charger maybe a good idea, the type you leave connected.