My car making a loud noise

Hiii
My Nissan Altima would turn off while I'm driving or
stopped at a light. And Ive always been able to  start it back
up , sometimes it took me a 2-3 tries, but it always turned
back on.. this last time it didnt start, didnt make a noise.
Just my radio turned on.
Everyone is telling me it might be my battery or alternator.
I didn't think it would be battery because my radio still
turns on.
I got my battery checked out today and it was pretty low so
they tried charging it and it ended up being no good.
I bought a used battery and my car started, but it's making
a loud noise. It had already been making a noise, but now
it's even louder. Hard to explain. There is a screach sound
in it, and especially when I turn the wheel. Idk if those are 2
separate issues.
Can you tell me what it sounds like? I can't afford to take in
anywhere yet. But I want to get some kind of idea of what it
might be.