I had an edition of Tips & Tricks that included a comprehensive guide to Chrono Cross, including how to unlock all the characters and get to the true ending. I remember that copy also had five pages or so of cheat codes to all sorts of games I didn't own at the time, it was like reading a treasure map.
In Italy it can be anywhere between 70 to 80 Euro, so anywhere between 82 to 93 Dollars. There are heavy taxes on a lot of electronic goods in Italy, which is part of the reason that it's not a very technological nation.
Back when I was about 10, I managed to get most of the way through Viper Manor in Chrono Cross before I figured out what Allocate meant... which was how you equipped your Elements, a.k.a. your spells. No idea how I managed that. My brother also got all the way to Lynx without realizing he could equip items. As an added bonus, neither of us knew until a few years ago, when Chrono Cross came to PSN, that you could run away from literally any fight, even boss fights. You could just leave, heal, and try again. We must have wiped so many times because of that, and it's really funny to think that we never considered to try that.