Can I use 'take someone to a place' whether it involves some difficulties or not? Yes.
Can I also use 'get someone to a place' when it doesn't involve any difficulties? Yes.
It often suggests that the process involved some difficulties.
it necessary that you take someone to a school rather than they go to school by themselves when you say: "You get them to school"?
The phrase does sound like you took them there.
But if you say 'I got my son off to school', it usually means that you didn't take him. You just got him out the door.
Such phrases are rather idiomatic, as you can see.