2000 Toyota Echo Only runs for 5 - 10 sec

The other day my 2000 Echo started missing, she would run fine until after about 5 mins. After that, it would run like it was only running on two or 3 cylinders so I took her to Auto Zone for a code check--it came back with p1315, p0141 & p0304. On the way home it really got bad! She started dieing on me. Just like u turned the key off. Before coming to a complete rest I turned the key all the way off and back on and she ran for 30 seconds or so--u would have to turn her all the way off--back 2 clicks--one click back would not work and this is the way I got her back home--about 7 miles turning her on and off. I wish now I had not hooked her up to there code checker because I think it burnt something out. Any Help would be very much appreciated! --It is my only way of going. Now she will only run for 5-10 sec. Before going dead. Its like the computer is cutting her off and not letting her run at all. I have checked everything I can think of. I don't have the money to take her to a shop! I have been out of work for a year now due to health problems--Can u please help me?