Assassin before 5th level?

[Star Shadow]

Is there any way of getting 5 ranks of stealth before 5th level, to become an assassin?

Is there any race, class, feat, talent, etc. that would give me one or more ranks of stealth?

Thanks in advance.

[Harley Quinn X]

No, generally ranks are used as hard level caps for things like prestige class, since you cannot have any more ranks in a skill than your total character level.

If you really want to go Assassin, then maybe talk to your GM about changing the requirement.