Engine shut off while driving and will not start

I have the vehicle listed above Sport. I admit I have been somewhat neglectful in it's upkeep lately, but circumstances have kept me from being to involved (I've been broke). A while back, the engine started making this horrible ticking sound, and I had the spark plugs changed, which did help the idle, it had been erratic, but the ticking persisted. Right after having the spark plugs done (I had not gotten the wires done yet, this was all within like, a day and a half), I had the oil changed. After the oil change the engine shutdown while I was going down the road, and has not started again. It doesn't try and turn over, just a loud click from the starter and nothing. I can't run diagnostics on it because it won't start, and I'm concerned that there is probably damage inside the motor. Also, I looked at a couple of the spark plugs and there seems to be oil on the ceramic part. I know it's bad for the ends of them to be wet, but I wasn't sure about the ceramic part. It has leaked oil ever since I bought it, and I've had it for 5 years. Any help would be appreciated, thank you.
Is this vehicle even worth fixing?

So, my boyfriend started tearing into it and worst thing I could've hoped for. Big ole' hole in the engine block. Not much to be done now, I reckon.