The book is available at UFDC (I have not checked for other online sources).
CHAPTER 1. How the First Giants came into the World
CHAPTER 2. Gargantua is Born
CHAPTER 3. Gargantua as a Baby
CHAPTER 4. The Royal Tailor's Bill for Gargantua's Suit
CHAPTER 5. The Year Gargantua had Wooden Horses, and what Use he made of them
CHAPTER 6. How Gargantua was taught Latin
CHAPTER 7. The new Master found for Gargantua
CHAPTER 8. Gargantua goes to Paris, and the Big Mare that takes him there
CHAPTER 9. The Parisians laugh at Gargantua. He takes his Revenge by stealing the Great Bells of Notre Dame
CHAPTER 10. Ponocrates, the new Teacher, desires Gargantua to show him how he used to study with old Alaster Holoferues
CHAPTER 11. The Two Hundred and Fifteen Games of Cards Gargantua knew how to play. What it was he said after he had gone through the List, and what it was Ponocrates remarked
CHAPTER 12. Gargantua is dosed by Ponocrates, and forgets all that Holofernes had taught him
CHAPTER 13. How Gargantua was made not to lose one Hour of the Day
CHAPTER 14. How the Awful War between the Bunmakers of Lerne and Gargantua's Country was begun
CHAPTER 15. How old King Grandgousier received the News
CHAPTER 16. How Grandgousier tried to buy Peace with Five Cart-loads of Buns
CHAPTER 17. How Gargantua, with a Big Tree, broke down a Castle, and passed the Ford of Vede
CHAPTER 18. How Gargantua combed Cannon-Balis out of his Hair, and how he ate Six Pilgrims in a Salad before Supper
CHAPTER 19. How Friar John comes to the Feast, and how King Grandgousier had recruited his Army
CHAPTER 20. Gargantua's Mare scores a Victory
CHAPTER 21. Showing what Gargantua did after the Battle, and how Grandgousier welcomed him Home
CHAPTER 22. Grandgousier's Death. Gargantua's Marriage. Pantagruel is Born
CHAPTER 23. The Strange Things Pantagruel did as a Baby
CHAPTER 24. After studying at several Universities, Pantagruel goes to Paris
CHAPTER 25. Pantagruel finds Panurge, whom he loves all his life
CHAPTER 26. Pantagruel beats the Sorbonne in Argument, and Panurge proves that an Englishman's fingers are not so nimble as a Frenchman's
CHAPTER 27. What sort of Man Panurge was, and the many Tricks he knew
CHAPTER 28. Showing why the Leagues are so much shorter in France than in Germany
CHAPTER 29. How the Cunning of Panurge, with the Aid of Eusthenes and Carpalim, discomfited Six Hundred and Sixty Horsemen
CHAPTER 30. How Carpalim went hunting for Fresh Meat, and how a Trophy was set up
CHAPTER 31. The Strange Way in which Pantagruel obtained a Victory over the Thirsty People
CHAPTER 32. The Wonderful Way in which Pantagruel disposed of the Giant Loupgarou and his Two Hundred and Ninety-Nine Giants
CHAPTER 33. How Pantagruel finally conquers the Thirsty People, and the strange business Panurge finds for King Anarchus
CHAPTER 34. Gargantua comes back from Fairy-Land, after which Pantagruel prepares for another Trip
CHAPTER 35. Pantagruel starts on his Travels, and lands at the Island of Pictures
CHAPTER 36. Panurge bargains with Dindeno for a Ram, and throws his Ram overboard
CHAPTER 37. The Island of Alliances
CHAPTER 38. How Pantagruel came to the Islands of Tohu and Bohu. The Strange Death of Widenostrils, the Swallower of Windmills
CHAPTER 39. A Great Storm, in which Panurge plays the Coward
CHAPTER 40. The Island of the Macreons and its Forest, in which the Heroes who are tempted by Demons die
CHAPTER 41. Pantagruel touches at the Wonderful Island of Ruach, where Giant Widenostrils had found the Cocks and Hens which killed him. How the People lived by Wind
CHAPTER 42. Pantagruel, with his Darts, kills a Monster which Cannon-Balls could not hurt. The Power of the Sign of the Cross
CHAPTER 43. Which tells of several Islands, and the Wonderful People who dwell in them
