If you got the saw off eBay, I doubt it was sharp when it arrived. First bit of advice: don't buy any filing tools from the Crosscut Saw Company. Second, be patient and look for the good gauges and other gear on eBay. There are a few antique tool dealers that have quality filing tools, but they are very expensive.
Watch Warren Miller's videos on YT. They are very detailed and he demonstrates the various tools as he goes.
One drawback for you with the Miller videos is his focus on two-man saws. Not all gauges fit all saws, particularly one-man saws like yours with smaller gullets. I made a video on filing one-man saws that shows some of these differences.
Today, my choice of filing tools would be: Atkins #4 hammer, Anderson #3 jointer/raker gauge, Anderson #15 pin gauge, Morin pin gauge, hammer head anvil, Simonds spider. Specialty files are not necessary, but you'll want to safe the corners on your mill files (grind the corners round). Just starting out, you could get by with a small combination gauge and cut your rakers straight.