2000 Toyota Corolla

2000 Toyota Corolla, has a rattle as the engine accelerates, after some research, i have concluded it is the timing chain. I can order the individual parts or a full kit. Do you recomend replacing all parts or just the chain, tensioner and guide.

You sure its a chain not a belt?
If its a belt make sure you do water pump also

I believe it went to a chain in 2000.