Changed water pump it started a few times and now wont start, but will crank

I just bought this car about a week or two ago its had two tires blow, this last tire blow out led to me finding out I had two cracks in the radiator/cooling hose (which I found out they no longer make it so had to use jb weld on it for now) and it needed a new water pump so I changed it after all the welds were done and the water pump changed it started a few times but shot radiator fluid back out of the reservoir so had to shut it off after the third time of shutting it back off we got the air out and went to go start the car and it will crank but wont start. I do know the guy I bought it from said its in desperate need of a tune up and an oil change it also does not have more than a quarter tank of gas and the positive cable on the battery is lose, also do not know how old the battery is. Please tell me if I change all of this on the car it will start and be fixed I dont want to put anymore money in the car. If it is a lost cause I am a single mom of two kids and I cannot afford to keep putting money into a lost cause car when I can sell it and put my money on a better investment.