Her ability reads: "Place your figure in an empty space within 6 spaces." Is this ability able to count spots that are not in los? Meaning, can you basically jump over walls, doors or even impassable terrain?

See Counting Spaces.

You cannot count spaces through walls, doors, and blocking terrain. You can count spaces through impassable terrain though - it only prevents figures (without Massive or Mobile) from moving into/through. (But here Ahsoka is not moving through, she is placed.)

Line of sight is not required, only that the empty space is within 6 spaces of Ahsoka and Ahsoka is able to end movement in the space. (I.e. the space is not impassable terrain.)

So, she cannot jump through walls or doors, but she can jump around them and through impassable terrain.

Much appreciated.