There are sporadic reports of head gaskets blowing when the head bolts strip out of the aluminum block. It seems the only long term repair is to replace the short block.
When it leaks.
Intake manifold gasket
You've got either a leaking intake gasket or a leaking head gasket. It's a serious problem which needs to be repaired.
By repairing he problem, which is more than likely a blown head gasket. Do not drive this car as severe engine damage will occur. My two cents: Note that other leaks can cause this problem. GM 3.1L and 3.4L SFI engines get this problem from a lower intake gasket. Chrysler OHC V6 Engines (chain timed) will do this if the water pump leaks.
A new head gasket.
It could oil pan gasket, or camshaft oil seals, or rear main seal (crankshaft), or crankshaft front seal, or oil pump gasket, or oil pump seal. I would start with the oil pan gasket. Before doing anything make sure that climb under the car and check where the oil coming from.
better have the head gasket checked for leaks
Water pump out, ruptured tank on radiator, or head gasket blown probably in that order.
Sounds to me like a cracked head and or a blown head gasket, i had a similar problem but it was on a Saturn
Gasket that goes between head and valve cover to prevent leaks
Head gasket is probably blown. Water is passing out through exhaust. This is a common problem with subarus
A common problem with the 2000 Toyota Camry is sunroof drain clogs and leaks. These can be repaired through the dealership.