Ford Focus 1 1.8b - What oil for the engine and transmission with a mileage of 3

My sister has an old Focus, it is 1.8 115HP petrol with gas, vintage 1999, hatchback, blue, manual transmission, gas is from 2010, mileage 330000km of which 130000km on gas. The car has been for three years and, to be honest, the oil did not exchange. In three years she did 6500km.

Now we have a dilemma. We do not know what type of oil and what exactly is in the engine.
There are no stickers and the previous owner says: I do not know what is there.

The car has the correct power, efficient compression and does not take oil. For three years, a maximum of half a centimeter disappeared on the bayonet. In the compensating tank, cleanly. The car does not kick and the engine is dry.

I need information about what is the original oil in this engine and in what quantity and information about what oil can be used now?
I really do not know if it's going to be mineral, half synthetics or synthetics.
However, I would like it to be the cheapest option that allows driving 8,000 km so that the car will survive for a year without a breakdown. At the end of next year goes to scrap.

The same question about the oil in the box. Her husband flew 2,5L from there. I know that this is not enough and it is not known what cheap you can pour in there.

The 10W40 semiconductor will work best. As you can not see any leaks on the engine, it is best to pour the oil the same as before but since you know what it was like a colleague suggests, due to the age of the synthesizer there is not worth it.

I wrote that it is supposed to be the cheapest, but actually 100 or 150 vs 200 is not a difference. So you say that a semi-synthetic can be?

Thank you for the advice. I'm looking for some cheap half-synthesizer in the 5L bubble.
From what I can see, Ford oil is at an average price of PLN 25-30 / L. Other "bubbles" are from PLN 50 up.
Overpay for this scrap?

Well, I'm thinking about him too. The only reasonable option to sell from Lotos.