usually having to sit for a minute or two can't push gas pedal then when restarting must push gas pedal to the floor

The radiator has a hole. Aware of that. We thought the thermostat was in need of repair so we replaced that. Test drove and the heat went straight between hot and cold, battery light came on, check engine light came on, shift to D2 light came on and so did my anti-lock light. I've only seen the anti-lock light come on while driving on ice. So that was wierd. When I got off the freeway, the car gave a jolt and then all lights dimmed. When I accelerated, the lights illuminated to normal levels. Please help me. I can't afford a car payment. I need this car to last a little while longer. I am also 8 months pregnant. Please, any advice would be extremely appreciated!