Chris,

Yes the yellow is normal, it is the oil turning color from being burned.
if your glow plug got cooked the coil could do many different things, but if it is gone then look in the cylinder for it, the coil COULD cause the piston to jamb in the cylinder, so be sure you clear it out before you run it again. and no your tranny does not need to be oiled it is one tuff bugger the Genesis series tranny's are.

Glad you had fun..