milknuggets

i finally bought myself an rx-7 and im happy. But im experiencing some wierd problems, probly commom for a almost 20 year old car. while i was driving it the check electrical system light just turned on and i have no idea why, i have yet to give it a tune up so that could be it, and under the stick shift you can see the floor. A lot of heat rises up from there along with smoke so that cant be good any help at all would be greatly appreciated thx