Do you get skill points with each legend level

Kicking does do a tiny amount of damage, but as far as I can tell (being level 22 in my game), its damage never increases. I have no reason to suspect that certain enemies (such as Goons) are immune to kick damage, and I'm certainly not willing to kick one a few thousand times to find out.

The only real use for the regular kick attack is to push zombies away from you, potentially stunning them and opening them up for a superior attack. (It also has the advantage of not using stamina.) If that's not your goal, you should just stick to using weapons, which do scale quite handily as you level. Your initial instinct may be to save your limited-durability weapons, especially if you've played Dead Island, but it's really not necessarily. Weapons are everywhere and can be repaired multiple times, especially as you level up and gain skills to make them last longer.

I dont know if someone can answer that for sure but after 2 playthroughs i would say those Closet-Zombies are random, can have different types (i found Biters, Gastanks and Toads so far) and can be found either in closets or in locked Vans (found 2 Gastanks and 1 Biter in such Vans).

Just found this video on Youtube maybe it's another place than yours.