he is the care taker
Neither. Argus Filch was a Squib and didn't attend Hogwarts.
As revealed in "Goblet of Fire", by house elves.
Hagrid is the Hogwarts caretaker responsible for various magical creatures in Harry Potter. Of course some of the professors have their own pets as well.
She tells Filch if the kids are causing trouble
He is the caretaker.
harry potter and the goblet of fire
SPEW, or the Society for the Promotion of Elfish Welfare, was founded by Hermione Granger in her fourth year at Hogwarts after she discovered that Hogwarts employed a large number of house-elves to do the cooking and cleaning around the castle. She formed the group in an effort to advocate for the rights of house-elves without realizing that the house-elves were completely happy serving humans.
A lot
J.K. Rowling also mentions that the house elf magic is totally different which allows them to apparate and disapparate inside Hogwarts.
House Elves were first introduced in the second book, Harry Potter and the Chamber of Secrets when Dobby tells Harry not to go to Hogwarts and enters his home in Pivet Drive.
David Bradley play Filch the caretaker at Hogwarts in Harry Potter and the Philosopher's Stone.
No, they are not related in anyway. They both just work at Hogwarts.