Will my formats and all other saved info work with TD3
Yes, If you have TD2 files, TD3 can access them, and it should display correctly. But you will not be able to make any TD3 files work with any earlier version.
will it still be located in the same place?
If you've left the save locations as the default locations, then yes, it will be in the same locations. If you made a custom location, you MAY need to re-configure that. With the preferences tab, I know I had to re-point them to proper files.
Do I need my code I got when I Bought TD3(I lost mine when we had a small fire about a year ago)? Will I have to pay anything?
TD3 has only been around as TD3 since around October/November, but has been in beta for quite some time, as far as I'm aware. A TD2 key will NOT work for TD3. You will have to get or purchase one. If you were a beta tester, you won't need to pay for that (unless there was a specific time frame for that, and Corey would be able to answer that). However, if you weren't one, or if the time frame expired, you can click here for info:
http://thetournamentdirector.net/upgrade.htmlJust note that both boxes refer to your TD2 license.