If there is any corrosion in the battery compartment (even a faint amount) the battery wire inside may be corroded/disconnected. These little cameras are a little tough to get into, but the wire problem is easily fixed.
If the meter indicator moves at all when a battery is installed, then there may be some hope. Try setting the ISO dial to different speeds and see what happens.
The crud on the lens will probably clean up easily. Start with soft cotton and lens cleaning fluid to get the worst of it off. Then, if there is still residue, dampen a Q-tip in a bit of water, and add a touch of toothpaste. Gently rub the lens glass in a circular motion, then clean again with lens cleaning fluid. This should remove superficial fungus and residue. Deeper fungus may etch the glass.
If the aperture blades continue to stay in the same position, a thorough cleaning might be necessary.
If I were you, I would probably try to return the camera for a refund, or try to get a partial refund to cover the cost of repairs. A half-14 usually sells for about $70 in Japan.