babette 0 Newbie Poster

I'm lucky to be given this nice older (2000) Mac Powerbook I think OSX with lots of cool stuff on it. I know very little about computers beyond e-mail and surfing. I can manually enter data into the Quicken program, but when I try to download it from the bank's online page, a window says internet explorer doesn't know how to handle the type of file. Then I check the computer applications, and it saysQoicken not available.
Help please!
p.s. Applications also says no firewire, but I have it and am using it. Do have old something on wall of house for it from moved in-house buisiness. I'm confused!