Hi Georgene,
How wonderful you'll be visiting the Walt Disney World Resort this coming November. It's a wonderful time, to visit, and you should make time to visit
Epcot International Food & Wine Festival, and taste your way around the world.
In most cases, you can upgrade regular tickets, either adding more days or options such as Park Hopper Option, or Water Park Fun & More Option. Note that special group tickets, like those given to conventionEARs or for special events, typically cannot be upgraded. Tickets can be upgraded if they are unused, or within 14 days of first use. Some old tickets may not be upgraded. Take a look at the
Tickets - Frequently Asked Questions page for more information.
Regarding how much it would cost, it depends as to when the ticket was originally purchased and what value it had. For example, for a recently purchased adult three day base ticket, adding the Park Hopper Option would cost $55 per person, plus tax. Take a look at the
Tickets page for pricing on theme park tickets and other options too.
You will need to upgrade them in person. You can do it at the concierge desk if you're staying at a Disney Resort hotel, Guest Relations in Disney Springs, or at a ticket window by the entrance of any of the theme parks.
See you real soon!
Ricardo.