I would urge you to have an electrician sort out your electrical issues first.
I helped a friend gut and rewire his kitchen and besides not being grounded, the wiring was very poorly done. I told him it was a miracle he didn't have a fire.
Their microwave would flip a breaker if anything else was on in the kitchen. I traced the circuit to a pull string light in the basement. The ENTIRE kitchen circuit was passing through a rusty old screw terminal on the light fixture. The wire's sheathing had completely melted back exposing 4" of bare hot wire.
Don't trust that old wiring at all. And if you can't afford to fix it asap, at least stock up on smoke alarms and have an escape plan.