Sam Gamgee is not related to Frodo Baggins. He is his gardener, that is all.
Sam and Frodo have an age difference of 6 years. Frodo is older than Sam.
Sam calls Frodo "master" out of respect and loyalty. In their relationship, Frodo is seen as the leader and Sam as the loyal servant, so Sam uses the term "master" to show his deference and dedication to Frodo.
Sam was Frodo's best friend, and Sam knew deep down that Frodo would never be mean to Sam unless he wasn't himself.
There was no family relationship. Sam was Frodo's gardener, and Frodo was Bilbo's cousin. Sam was the son of Gaffer Gamgee who probably helped with the gardening at Bag's End for Bilbo's family.
Sam is Frodo's companion that helps frodo take the ring to mount doom. He, like Frodo is a hobbit from the shire.
Merry Brandybuck and Frodo Baggins are distant cousins (second cousins once removed, in fact). Most of the hobbit families are distantly related. Frodo's mother was a Brandybuck. -sam-is-my-hero-
Frodo's friend and sidekick is Samwise Gamgee.
Cracks Of Doom
Yes, after Rosie Cotton dies, Sam (who is now about ninety) gives the Red Book to his daughter Elanor and sails across the sea to be with Frodo, which he was permitted to do since he had been a Ringbearer, if for but a short time.
He leads frodo an Sam towards mordor and slowly turns frodo against Sam. Then when he falls off a cliff after a fight with frodo, we don't see his for a while until Sam and frodo are climbing up the slopes of mount doom. He then attacks them and tries to take the ring. Eventually Sam and frodo escape and are standing on the edge of the lava about to drop the ring into the volcano when gollum hits Sam on the head with a rock and then bites frodos finger off and claims the ring for himsefl, jumping around with joy. THEN frodo attacks gollum an they fight for a bit before they both fall off the edge. Frodo manages to hold onto the rock but gollum, who is holding the ring, falls into the lava and dies.
The three eagles that rescued Frodo and Sam from the destruction of Mount Doom were Gwaihir, the Windlord, Landroval (Gwaihir's brother), and Meneldor.
Gollum