SAE 5w30 any major brand. Use High Mileage oil if it has over 100,000 miles on the odometer. Also use a quality filter such as Purolator, Bosch, Wix, etc.
You can use PH3593A which is a Honda oil filter. There are also other sizes you can use that will fit but they are the Honda brand.
10w30 any major brand.
Honda ATF if Auto(don't use Dexron/Mercon) and 10w30 oil or Honda manual Trans fluid(which is fancy 10w30)
The 2003 Honda Accord runs on regular unleaded.
The 2012 Honda Accord runs on regular unleaded.
The 2009 Honda Accord runs on regular unleaded.
The 2004 Honda Accord runs on regular unleaded.
The 2002 Honda Accord runs on regular unleaded.
The 2010 Honda Accord runs on regular unleaded.
The 2014 Honda Accord runs on regular unleaded.
The 2005 Honda Accord runs on regular unleaded.
The 2006 Honda Accord runs on regular unleaded.