[97 Legacy wont turn over]

The check engine light was constant than flickered before it died. I got three codes P1100, P0462 and P0170

[97 Legacy wont turn over]

2.2 the man I bought it from has paperwork saying timing belt and water pump was done 15000 miles ago. Could it ne a ignition coil issue?

[97 Legacy wont turn over]

I bought the car a month ago and drove it until last week when it stopped starting. When it was running it idled real strange when stopped, kept bouncing around but wouldn't stall. Also when it shifted to second it seemed to lag some power. Than it overheated once but cooled down and never overheated again. Next day the check engine light popped on and it got about 10 miles a gallon. So now it will crank but wont turn over. I replaced the fuel pump, fuel filter and spark plugs. I am not that mechanically inclined and also can't afford to get it to a shop right now. Really hoping someone could offer some incite on what to do next. Thank you