cranks but will not start

I just bought a secondhand SGS , was not going when I bought it, they said it was the fuel pump but I seem to be pumping fuel up. The firing order was all out so I looked it up and put it into the right order but still would not fire. (All plugs are sparking and smell like gas) checked the fuse box and the automatic choke/fuel pump had a blown five fuse Which is meant to be a fifteen, I swapped it to a fifteen, but still will not start. I read on another forum that I could do a fault code test with the ECU ( pulled the whole dash/center console apart and could not find the damn thing!) While doing that I found a small key and barrel behind the glove box as pictured, what does it do? Does not make the car start that is for sure. Can you tell me where the ECU is? Or any other ideas as to why it will not start. Please help this is mind boggling!