2000 MITSUBISHI DIAMANTE User Comment / Complaint

I purchased the car used from a mitsubishi dealer, a month or so later i noticed a maple syrup type smell. the proceeding months the problem got worse and noticed that my windshield kept fogging up. i took it to my local repair guy who gave me an estimate of one thousand dollars to replace the heater core and informed me that if i dont i could have a computer failure because it is right under the heater core which in turn may cause an accident due to loss of control. my passenger side carpet is now soaked with coolant and the smell is horrible coming from the vents. i have heard that the coolant is toxic and can cause problems in your respiratory system which concerns me even more.