FrogReaver
The most respectful and polite poster ever
Should Ranger/Paladin get 1 level 1 spell at 1st level?
Depends on if you mean "Should" or "Do". By RAW, No, they get it at 2nd level. If you are talking about "should", that will be subjective, and a decision for you or whoever happens to be DM.
No. They get spellcasting at level 2.
Not if the DM rules otherwise
Should the DM rule otherwise?
As a DM, I wouldn't. A 1st-level Ranger or Paladin would be too much stronger than a 1st-level Fighter if they got all their class features and spellcasting.
I'm assuming that Fighters, Rangers, and Paladins are all balanced at 1st level. Giving some of them extra features would unbalance them.
Do you disagree with this assumption?