Engine Oil Leaking problems of the 2012 Kia Motor RIO

I recently purchased my vehicle and immediately noticed what seems to be oil coming from the engine, pooling on top of the block but also leaking onto the ground after being parked for an hour or so. The walls around the engine, mainly on the left side or passenger side were saturated with presumably the same fluid. Under the car is also saturated from what I am guessing to be a leak, perhaps the same leak from atop the engine block. I've had the car repaired and paid for a system fault diagnostic, and in both cases haven't received any helpful info as to what it is, the cause or where the leak is coming from, or how to treat it. I very recently had the oil changed and the invoice showed a comment stating that my car appears to be leaking oil. There was no further commentary. I fear that my kia Rio may be dangerous to drive for reasons such as a fire hazard or breakdown from overheating possibly resulting in leaving me on the side of a highway, stranded. Also the a/c and heater do not operate as they should. The panel controls are out of whack and neither a/c or heat perform in sync with the commands. A mechanic has said this appears to be due to electrical issues, possibly with the main computer, though the systems fault diagnostics was performed after the mechanic informed me of this, and seeing that I was charged for that service I can only assume that the main computer is doing what it is meant to do, relaying the info to the tech's computer. I just don't know if I have a good car that needs a lot of work or if I'm driving a deathtrap. No recalls for this vehicle but I see a lot of kia's vehicles being recalled. And I believe they no longer make the kia Rio. Just at a loss as to what is happening and what to do about it. Times are tough financially or I would definitely have more proper detailed info to give, that or have a good running car. . .

Engine failure will driving on the highway. Engine started knocking and oil leaked out of the car and it blew up.