the engine would start to turn over but then a rattling sound

Check the battery, sounds about dead. The noise could simply be the starter and solenoid do not have enough amps to turn the engine.

[quote:8b7e28ef6a="Supersami"]I just tried to start my Camry this morning but couldn't, when I turned the key it would make an ignition sound and the engine would start to turn over but then a rattling sound would come from under the hood, could someone please give me some more information on this problem, Thanks.[/quote:8b7e28ef6a]

Recheck the battery and its connections-now if it can start and the noise is there-might be a timing chain problem further investigation is required.

after getting the battery properly load tested and if its not the problem, i wouldn't be surprised if the starter is going bad. one of toyota's weak link. i change them all the time.