Welcome to my Chrono Trigger walkthrough. It won't go through the entire game, but it will tell you how to get certain endings.
After you name your charector and wake up and follow your mom downstairs you'll get a chance to name Lucca your friend who knows all about science. After you name her talk to your mom again and you'll get some more money (you already started out with some cash). Leave your house and walk towards the North East. You'll see what looks like a fair. When the text at the top of the screen says millenial fair press "A". Once inside try to win some silver points by betting on the races. To do this walk over towards the tents. If you are on the stairs you've gone too far. Head east and you'll see a guy standing by a tent. Chances are when talk to him he'll say "The race is still on sit back and watch". Wait for the rcae to be over and for the racers to line up. Then pick whoever you think will when. There's an old man sitting near the stand behind a fence and he'll tall you who thinks will win, but he's not allways right.After winning some silver points (about 60) head over to the tent of horrors. It's located to the far North East of where you entered. Play some of the games and try to win a Chrono Clone by winning the 40 silver point game. You will probably want the Chrono Doll, because later Chrono dies and you need it to bring him back. After winning the clone and the Pyozo Doll (or something like that) head towards the stairs North of where you came in. The Pyozo doll is won by playing the 10 silver point game. You'll see a girl running around. Run right into her and you'll both go flying. After that Talk to her First then go and pick up her pendent. She'll ask you if she can have it back. Say Yes, if you don't it will have a bad effect on your trial later on. Then you'll get a chance to name her. After naming Marle go towards the east of where you slammed into her. You should see stairs going down. Head North East and leave the screen. You'll see a giant robot in the middle of the screen. After you talk to it you'll have to fight it. By beating it up you'll get EXP (expirience point) and silver points. If you allready have both of the needed items from the tent of horrors you can cash the SP's in for real cash just North East of where you bumbed into Marle. You can trade 10 silver points for 50 GP. After wondering around for a while, you'll get a message the Lucca's Machine is completed. Go to the very North of the fair, but make sure you wait for Marle to but candy (it could have a bad effect later on). After the little show you'll end up in 600 A.D. I hope you've taken the time to build up to at least level 3. It doesn't matter if you didn't, you'll still be able to win all the battles on the Mountain.
Making sure to pick up all the treasure chests leav the mountain. If you're not on level 5 go back in and build up to at least level 4. After that walk around the twon for a little bit, and talk to the people. Make sure you heal up and save your game. Then go through the forest to the castle. After fighting around and searching for little shiny blue things (these are tabs that will raise an attribute), there's one to the East of where you walk in. It's towards the bottom right of the forest.