Cars !!!!!!

Should I buy a new used car that's about 3,000 or should I fix my 2006 pt cruiser that needs a new timing belt and engine? Would it be like 1,000 to fully fix? I'm trying to figure out if it is that expensive to fix or should I just overall get a new car.. I have to kids so a car is very important...My car broke down last month :( it's so tough finding rides and everything, so I'm thinking I will get a car with taxes that come.. also is it way to expensive to get a car from a car place and make payments every month? What's the lowest those payments can go? Do you guys know any good car places?