Cbaker65 and gandalfnz are both really knowledgeable about nitro. Hopefully once theyve seen I've tagged them they can help provide some additional info. I'm semi-knowledgable about nitros but electrics are more my wheelhouse.
Its normal for fuel to come out of the exhust pipe if its being cranked but it isnt starting up but fuel should not be leaking from anywhere else. You'll need to investigate the other leak and try and determine whats causing it to leak. Some pics of where its leaking from around the engine might...
I'll address your question directly in a minute but Id like to start out first by saying, if that kit has been sitting in a garage for 2 years, the very first thing I would do is tear down and cleaning of the entire kit. Inspect all bearings for free and smooth action, replace any rusted screws...