Just a small remark: the 3.0 Ranger did have a pet, starting at 4th level. If wasn't written then explicitly in the class progression chart, but it could be obtained by casting the Animal Friendship spell.
Actually any character can dual-wield in 1e - we've always had the to-hit penalties vary based on one's Dex score (higher Dex = less penalty) but I can't remember what the RAW says. As 1e Rangers were very unlikely to have decent Dex (remember, they needed good stats in all of Str-Int-Wis-Con just to get into the class) a dual-wielding 1e Ranger would be a very rare sight.Dual wielding has been a feature of the ranger since 1e. If I remember correctly, hidden in the ranger's class description is a note that the ranger can wield and attack with a weapon in their main-hand and off-hand, reducing the penalty for their main hand by two and their off hand by four. Which I think is the same benefit they get in 2e.