I'd start with:
Replace the fuel line abd pressure line
Fill and rinse the tank completely a couple oftimes using oil, cheaper then using the nitro methanol fuel.
Clean the exhaust pipe out,
Replace the Glow plug.
With glow plug off tip a bit of oil through and slowly wind the engine over a little bit.
Replace the air filter.
Check that no dust is in the carbie, it so remove the carbie and clean it out.
Take it out side and see if it will start