The shells look pretty poor and in need of renewal, but the big end journals are unmarked. Nevertheless it would be worth measuring the journal diameters with a micrometer at several points to ensure they are still round and parallel. The chances are that the crankshaft main bearings are in similar condition so they need to be inspected.
The oil pump has a mark where the rotor has scuffed it. Whether that is enough to cause a pressure reduction depends on how much end float the rotor has. You would need to measure that end float and compare it to specification to be certain. Check also the amount of side play in the pump bearings while it is open, and look at its drive shaft to ensure it is undamaged.
Given the state of the bearings and the low compression you ought to pull the pistons out and inspect the bores and the rings. There's no point repairing the bottom of the engine without fixing the top as well.
If all the above is in need of repair you are heading for a very expensive repair which will cost several times the value of the car. That is fine if money is no object, just as long as you are prepared for it.