You have 2 choices and 2 solutions;
1) keeping this car for next 3-4 years.
2) selling this car soon.
If you want to keep this car than please don't overhaul your engine . 1KR-FE never gets overhauled. (disposable engine)
I did the same mistake.
If you want to sell this car, just overhaul the engine and sell it on urgent basis.