Car makes whizzing noise while trying to turn over but won't start

2 weeks ago we changed the battery. We had to clean the throttle body afterward because it wouldn't idle. When it finally started it was making a metal grinding noise only while starting, but ran fine after that. Last week it started and made the noise, but the grinding continued the whole time and 2 blocks up the road the car died. It wouldn't start after that just made a whizzing/whining. Changed the starter and no change. Have no clue where to look from here.