1974 Chevy Nova leaking engine

My car lately has been leaking fluids from the middle section of the engine on the passengers side. It pools after sitting for about 5+ hours but then stops when the pool reaches about 4-6 inches in diameter. I haven't checked if it is oil yet but I assumed that it was beacuse I have to add about a quart every one to 1 1/2 weeks when I fill up. When I start my car white smoke will come out of the exhaust temporarily along with accelerating on an on-ramp (Only the first time during the day, any time I accelerate quickly the rest of the day, it does not). Question: 1. Would oil leak from that side of the car? 2. Does this sound like another leak like coolant, antifreeze, etc? And if so. Is a car with this age and mileage expected to require that much oil? Either way it seems that I may need to take it in to fix a blown head gasket or get new valve covers? The engine compartment is also really grimy and I haven't had the oil changed in a while unfortunately; so could it be a back-drip problem. I am going to take it to a shop to get it looked at but I just need some ideas and talking ponts about the problem; so if you could tell me what you think the problem may be it would be much appreciated.