What could be the problem?

My car is running really bad and idling bad and it backfires alot as well, it dont
like to start most of the time and when you do most of the time you have to
keep giving it gas to keep it running and as soon as you put it in Drive or
Reverse it will usuallu stall out and die and when coming to complete stops it
will die occasionally usually have to put it in Nuetral and give it gas while
stopped and then give it gas and put it into Drive or Reverse and thats not
good for it i know so what could be the issue with it? i dont have alot of money
so buying new parts is a lil out of the question but if i have to i will find a way
but if there are any remedies or cheap fixes or short term fixes id gratefully
appreciate all the info and help. Thanks