Changed timing belt now it will not start. is there a reset

Check camshaft oil seal also if head wasn't skimmed or not torqued down properly & with new bolts it could be leaking out of head gasket

If the flywheel failed you'd surely know it. There'd be pieces of car all over the road. As far as the timing belt is concerned, that's is a distinct possibility. If the car has more than 70K miles on it and the timing belt has never been changed, then in the case of a sudden no-start condition, the timing belt is always a real possibility.
There are a couple ways to check for a broken belt, but before I tell you them I must tell you this. The engine in your car is referred to as an INTERFERENCE engine. This means that if the timing belt breaks while the engine is running, the camshaft and crankshaft will be out of synchronization and the valves in the head will hit the pistons in the block and bend or break. Now, to check for a broken belt, the easiest way is just to crank the engine. If it seems to crank over much faster than it normally does, then there is a good change the belt is broken. If you cannot tell for sure, you may be able to see if the cams are turning by removing the oil filler cap and looking down into the valve cover. If you can see the camshaft when looking into the valve cover, crank the engine and see if the camshaft is turning. If not, you got a broken belt and a trashed motor. It will require, at a minimum, the head to be repaired and resurfaced, new head gasket and timing belt and tensioner. If you have the 2.7L engine, you should replace the water pump at this time as it is driven by the timing belt. There may be additional damage done to pistons depending on how fast the engine was turning when the belt broke.

After so many over heats.a car sometimes cant handle.
after constant over heating your cars rubber gaskets could have gone bad and turned brittle letting in oil into spark plug well #1
for your spark plug problem i would recommend changing your valve cover gaskets.
and for the over heating and not turning on.
i believe you blew a head gasket.

put in time and remove valve cover, front engine cover, timing belt ,exhaust at manifold, intake manifold and remove head bolts, pull head clean all surfaces replace gasket after head ck for cracks follow specs on bolts and put back together in a shop in would take about 4 to 6 hrs to do .

recheck your cam timing belt, sounds like it jumped on you. PCV valves generally plug into the valve cover and you would have had to seen it when you pulled the head. not all cars have them

You didn't tell us in which currency that '2780' was quoted but if US $, that seems unreasonable to me.
Timing belts can cost >$100 but not often and vary in degrees of difficulty to replace; on one of our cars (87 X1/9) it's about a 30 minute job. A Subaru Outback is more like a couple of hours so yours is likely in that range somewhere.
Valve cover and transmission gaskets aren't normally that tough to replace and cost little; check one of the chain auto parts sites to verify that. It only takes a few minutes to run up the potential parts cost and the labor should run well under a $1000 total.
Now you have a second opinion but, get a 3rd one in person.

I just changed mine two days ago.I have a 1994 Protege DX and the VIN number says it's a DOHC. It does have two overhead cams BUT the value gasket is for the SOHC. My gasket has 6 holes.... just double check.

Simply loosen the six 10mm bolts and don't forget the 10mm bolt left side holding the timing belt cover in place. Disconnect the two rubber hoses and each end of the valve cover. I used a small screw driver to try out the old gasket. reverse process.

A bad timing belt yes kind of, more likely not aligned when being reassembled.

The timing belt is inside the valve cover. You have to remove the the valve cover gasket. Underneath that you will find the valves, the head (the top of the engine block). There is a pulley that is used to tighten the timing belt. The pulley is attached to the piston and valve timing. This pulley is usually marked as to where it should be positioned in relationship the timing of the pistons and the cam shaft rotation. This is what is referred to as stting the timing in the engine, and the timing of the distributor. Since your belt is broken the engine has lost track of its timing, so you might have to refer to a manual on your model of car to set the timing. You will also need to replace the valve cover gasket when you put the valve cover back on.

There are two slots in the valve cover right by the cam shaft sprocket that have to be honda bonded or black rtv. look closely at the valve cover right above the gasket underneath the timing belt cover. Hope that helps.