Its pretty common on higher mileage X20XEV's for the oil pump to fail, or the feed pipe to the top of the block, gets clogged up and stops flowing oil.
To be honest, if its run with no oil in the top end you've likely done some damage to the cams, and I really wouldn't bother fixing it unless your handy with a spanner and don't mind getting your hands dirty. If its only been run briefly then its possible with the pump/pickup pipe sorted you'll be fine... ITs worth the risk, as a new oil pump could be fitted to a replacement engine thus your not losing anything out of doing it.
Replacement engines are cheap, and you can have it out and back in, in a day.
For the oil pump, check this thread:
Oil problem on 2L ECOTEC