Welcome To  Discussions sendthecalvary2me!
You have not provided the system specs of your Mac, so this reply is very generic.
Mac OS X Versions 10.1, 10.2, 10.3, and 10.4, are complete system upgrades that must be purchased.
Once an OS has been installed, the point upgrades, such as 10.1.x to 10.1.5 (Final) 10.2.x to 10.2.8 (Final), 10.3.x to 10.3.9 (Final), and 10.4.x to 10.4.9 (Pending), can be downloaded for free.
Tiger is available for purchase at The Apple Store (U.S.).
Panther, is no longer available directly from the Apple Online Store, as Tiger 10.4.x is the most up to date OS.
If you know what to look for, a Full Retail Version, of the Panther Install CDs, or a Full Retail Version, of the Tiger Install DVD, can also be purchased rather inexpensively, at some online Apple retailers, Amazon, eBay, AppleRescue, FastMac, etc.
Be sure not to purchase grey, upgrade or machine specific CDs or DVDs.
Panther is only on CDs, not DVDs.
Unless purchased from AppleRescue, the discs should look exactly like the images in the above links, and not say Upgrade on them.
Additional info in these links.
Using OS X Install CDs/DVDs On Multiple Macs
What's A Computer Specific Mac OS X Release
Software Update, Upgrade: What's The Difference?
Once Panther 10.3.x is installed, you can use the 10.3.9 Combo Update, to upgrade to the final version.
If your Mac meets the Tiger System Requirements, you could also consider installing that, and then use the PPC 10.4.9 Combo Update, to upgrade to the current version.
Panther System Requirements
Additional Panther System Requirements
Additionally, 'Tiger ships on a DVD, but if your Mac doesn’t have a built-in DVD-ROM player, you’ll need CD media.'.
AppleRescue, also sells a Tiger installation set on CD
Shop Carefully, Examine All Documentation, And Good Luck!
ali b