Ribbons, medals:
The blue and gold ribbon with the oak leaves attached indicates he received three air medals, or at least at some point he had that many. Active pilots in WWII received Air Medals more than once during their tour. The other ribbon is the Asiatic/Pacific campaign medal ribbon. The stars represent campaigns in which he took part. You can look up the official campaign list from WWII and find out which ones were authorized.
If you have his name, you can go here:
http://aad.archives.gov/aad/fielded-sea ... S14&bc=,slEnter his name in the format last#first, and you should come up with his service number. Once you have that, you can then start searching for his records. There are two places to look. First is the NARA website
www.nara.gov. As a family member, you can receive whatever they have of his service record. There was a fire in 1973 and a lot of records were lost, so you might be out of luck. The second place is to figure out which county and state he was discharged to, and then go to that county and look up his discharge paperwork. Each returning servicemember was required to file his paperwork in the county seat upon returning from service in order to receive benefits from the GI Bill. Many of these municipalities have this information on-line, but not all of them. His discharge paperwork will have some of his units of assignment, his awards, and any decorations he held.
Once you have all that, then you can start looking for his unit information. Certain units participated in certain campaigns, and you might be able to narrow down what unit he fought with based on the medals, ribbons, and research you can do.
As for the aircraft, there are many people who might be able to help you here. Good luck.