1: You stop gaining HP and Perks with 24 but can still gain skill points as long as you level further
2: You wll respawn in your room or platoon base
3: 250 for sg, bg, ew and hand to hand, 200 for all other skills
4: yes you can, but it's a tedious process especially if you have a lot of ressources. Join irc on forestnet/ashesofphoenix and ask a dev like me to help
5: There is one but for some reason it's wiped right now. we will fix it for next season
6: for each point of strenght missing, you get a hitchance malus of 20 or 40%, cant remember which. This reduces your effective range
7: there are no addictions and aside from voodoo which first increases your run speed but then forces you to walk for a minute after it runs out, all drugs only have a single stage, meaning you have positive and negative effects at the same time and not in 2 separate stages.
There are Buffout, Mentats and Blood moon as long lasting drugs which last 1 hour and afterburner, voodoo and psycho which only have a short durations of 2 minutes or something, but much stronger effects.
There is also food which is separate and just increases your carry weight and healing rate. You can stack up to 4 food items.