Frodo feels a sense of responsibility and fear after talking to Gandalf about having the ring in his possession. He realizes the weight of the task ahead and the danger that comes with it.
Frodo knows Gandalf because Gandalf was like Bilbo (Frodo's grand-uncle) guardian on Bilbo's adventures. Now, Frodo knows Gandalf through Bilbo.
Gandalf the grey has quite a deep voice, although he has the ability to change his voice depending on the scene. For example, when Gandalf is talking to Frodo he has quite a quiet voice, but he can be very loud and deep.
no
Frodo knew this ever since his talk with Gandalf at Bag End. Gandalf told Frodo of Gollum's history, and the sad fate of what happened to Sméagol and Déagol.
Frodo is actually sitting a ways back in the cart from Gandalf, but because the seats they are on are not actually shown and compared, and the side of the cart is the same, the audience gets the effect that Frodo is just smaller, and not actually sitting back.
Gandalf tells him
Gandalf said it to Frodo
He made him leave the Shire with Frodo.
frodo bagins the hobbit FAMILY FEUD: frodo gandalf gollum legolas aragorn sam gimli
The group of people who set out from Rivendell with Frodo were; Sam, Merry, Pippin, Legolas, Aragorn, Boromir, Gimli and Gandalf.
Gandalf told Frodo about Gollum's history while they were at Bag End then later in the story Frodo told Gollum his true name.
take it to mt. doom and destroy it because Saurman is looking for it