Driftbaby

hey guys, I have 1996 Audi A4. I just got it and I'm a first time owner. Since I got it I've had to replace the starter and battery. I got it started the issue is before I can start it I have to hold the gas pedal to the floor before it will start. Fuel pump kicks on. I can not locate the fuel filter to see if it's clogged. I also have a coolant leak I believe it's coming from the water pump but I drive down the road and it completely runs out and my car starts over heating and it won't let me drive no faster then 10 mph. Also when your behind me the gas smell is so bad it's burn your nose and eyes. Can someone please tell me where I can locate my fuel filter to see if it's clogged and give me information on my Audi please and thank you!