Hi thank you for your question hope this helps.
A quick test to see if your fuel pump is working. Turn the key on just be for starting can you hear a humming? that is your fuel pump coming on it should hum for about 2 seconds then stop.
The fuel pump on is located inside the fuel tank assembly.
Hope this helps
Yes if you remove the 8mm bolts that is the fuel pump.
On some models there was an access panel in the trunk. You got lucky you should not need to remove the fuel tank.
Hope this helps.
The bigger line the 2 2 1/2 is the fuel line out on the pump to the engine. The smaller line is the fuel return line from the engine to the tank.
Ask all the questions you need that is what i am hear for. good luck