WOW! That’s an ambitious several days! We live just over an hour away from the parks. October is great time of year to go generally since it’s not as hot (still warm). I can’t really speak about Universal as I haven’t been there since they added a bunch of stuff, and well we get into Disney for free since my sister works there. If you’re thinking about eating dinner at a restaurant on Disney property I’d call and make reservations now, especially if it’s a popular place. Good luck and have fun!!! 
Eating:
Seasons 52
They use fresh, in season food to create meals that are under 475 calories. You don’t get bread to munch on, but they do have some fabulous flatbreads on their menu.
Evening Entertainment:
House of Blues - Orlando at Downtown Disney
KSC could quite possibly take all day, and you might just wanna crash or do something relaxing when you get back. It’s been awhile since we’ve went but there’s a fair amount of walking/standing/picture taking. Oh, you might want to look at the KSC launch schedule and unless you have tickets you might want to avoid KSC (unless that’s in your plans ) on shuttle launch days. They actually have a shuttle on the pad right now with a planned launch of Oct. 10.
Disney parks - Epcot will probably be running their Food and Wine festival while you’re there, and that does get very busy on the weekends. IMO, it’s overpriced food, but there are some good things to be had but still I’d save my money and get a really good meal somewhere. Some of the days they have some bands come in for their Eat to the Beat series. All sorts of events, for a price of course! If things get a lil boring at Epcot you can hop on the boat and head to Hollywood Studios (formerly MGM) and ride the Tower of Terror.
Animal Kingdom - we’ve been there exactly once, in the middle of July and the animals were hard to see/find because it was SO hot. My recommendation there is go to that park first in the morning when it’s a bit cooler and go on the safari ride (I forget the exact name of it, but you save an elephant from poachers or something). To me, it just kinda reminded me of a zoo.
Magic Kingdom - I always thought this was a dorky place, but it’s not so bad after awhile. Go early, head to the back of the park for the water rides, Haunted Mansion, Pirates of the Caribbean, Big Thunder Mt. Railroad etc. Peco’s Bills has yummy hamburgers n such with all the fixins you can imagine!
Depending if you stay at a Disney hotel or not, some of the parks open early for people staying ‘on property’ you might want to look into those.