We do not expect you to automatically have all these items immediately. In fact, the acquisition of most of them is a constant ongoing struggle of reacquiring, recharging and upgrading (especially when it comes to MR gear). As time passes you will collect many of these vital items customarily.
However, possession of an OT hammer and a WC cap is a necessity, as it ensures you won't be stranded in potentially lethal situations.
Also, the most crucial raiding upgrade one can make to their character is experience. The higher level your character the more damage you will be able to sustain and the more you will able to resist naturally without gear, tonics and trinkets.
Remember the AG mantra: "Levels >>> Resists >>> Clickies/Potions. Don't suck."