Running Rough...

OK, I'm at my last nerve with this car!

1997 VW Golf K2 1.8l 5spd.

Having Gas mileage issues, like only 200 kms a tank.
Back fires a lot in the morning.
Misfires mostly when cold, but occurs when warm as well.
Hard time starting in the mornings, sometimes 2-3 trys.
Really bad smell of unburnt fuel all the time.
Bad hesitation.

I've changed the TB to Intake Manifold gasket.
Changed the Coolant Temperature Sensor.
Changed the Plugs.

What's my next step without causing me a small fortune.

Wires, Cap, Rotor and fuel filter are about a year and a half old.
Car has gutted cat (from previous owner).
Has 227,xxx kms.

Any suggestions would be appreciated!

Thanks,

Steve Cornick