good cheap car needs mechanic work

We bought this car in 2001 for daughter to use for college. She got rear ended by Dodge Ram in 2004. Replaced taillights,trunk and whatever else necessary to continue to use the car and make it operable. I began driving it in 2004 and have had all children drive it for work, leasure and driving tests. Now that all children are grown and car is 14 yrs old, t is showing its age. Replaced all tires within the past 2 yrs.Replaced timing belt,crank sensor,starter,has another battery now for less than 2 yrs,new terminals, emoved catalytic convertor this summer. Replaced with straight pipe. It runs quiet. Has flat tire on passenger front. Removed original stereo and replaced it with cdplayer/mp3. The only problem I'm having is starting/not starting. It will start sometimes but I don't know when and I don't know when it won't and therefore, s I am 61 yrs old and not a mechanic, don't know how to fix this. When it is working, t is a very good car. Up to 28mpg average. It's a cheap good car. One owner or at the very least, as stayed in the same family. I have enjoyed driving this car. Once the starting issue is fixed, t will provide lots of driving pleasure to whomever gets it.