Season 5, episode 5. It is titled "The Quarterback".

Monteith's family has not released a statement regarding funeral arrangements.

As of 7/15/2013, Monteith does not appear to have an instagram handle.

Yes, it will go on. They will think of a way to make him leave the show since he died. I think they will say he got in some type of accident and died. For more info check the link under the related links section.
While it was intended for Monteith to continue on as a cast member in Glee's upcoming 5th season, due to his death, the writing and production staff on the show are attempting to find ways for Glee to continue without him. Production on this season was supposed to commence in the upcomming weeks (as of 7/15/13), but it is likely that fillming will be delayed in light of Monteith's death. The show has already been renewed for 2 seasons.

Cory Monteith's eyes were brown.
Cory Monteith had brown eyes.

erm..

Yes, he was right-handed.
Yes, he was right-handed.

Cory Monteith is definitely NOT fat. You can even see in the Glee episode Rocky Horror Glee Show. There's a scene where he walks around the halls in nothing but his boxers and sneakers.

Cory Monteith has never been to jail.

no she dose not lea michelle dose ok get it through ur head he is 30 she is 25 they r getting married ok bye

No, she wrote that song before she knew him.