Hi Amanda,
I do not know if your intake will be exactly like mine after seeing your pictures. My intake is made up of a lower and upper. There were 2 bolts on the ends of the top half of the intake. One on the front side and one on the rear and a hand full up and down across the manifold. It then lifts off.
A new gasket ran me about 13 bucks from the dealer. Most auto part stores could not get it and auto zone argued with me that it was just one universal gasket and not a lower and upper so I said for get it and went to the dealer and it was much cheaper...O-rings were a million dollars at the dealer but I paid around 9 or 11 dollars for a box of 12.
It is very hard to really see where the leak is with the manifold on. I spun my starter a bit with it off trying to build up fuel pressure in hopes of seeing the leak....
NOTE......make sure no one puts the coil wire back on...Mine started up with the top half of the intake off and I SHUT IT OFF right then and wanted to ...well you know..Found the leak though.....
Pressure regulator on mine is on the front end of the fuel rail. Amanda do you have a manual ? If not I can pass on a link to an online manual I think. It is in the other group I am in.
The o-rings are on each injector....One slides up the bottom and one on the top where they fit into the fuel rail. I found out about the one on the pressure regulator after I was done so I have no idea how many there but I beleive just one.
I had a leak where the rubber hose connects to the metal fuel line right where your circle is on the picture and it ran directly onto my starter....Again I wanted to hurt this seller who fixed it.....lol
I also had leaks on 2 hoses up under the manifold where the metal fuel line connected to the fuel rail...Again sellers wonderful repair job....
I am not sure your throttle body is like mine.....You will know when you begin to remove it and several hoses hold it there....I have coolant lines that run through it and a u shaped piece under it.
I hope I answered all your questions....You can p.m me any time if you want....I will get back to you just as fast as I can.....
I know one thing....You Amanda will fix this problem...I believe this wholeheartedly....
Have a great Friday!!
Jami