Beginners Help Needed

Ive recently started playing lineage 2 and im unsure of what items to wear i have tried on newer items but i keep getting penltys given against me for wearing incorrect clothing and weapons, how do i know which weapons suit my class and the correct weight, where can i find out how much body weight i can hold?

also i have squire pants in my bag which i just cant get rid of when i go to a shop to sell it wont show up in my bag and if i go to drop them it says they cant be dropped.

Please help on any of these questions
Regards
Nick

there is a little letter behind the item name.

1-20 no letter
20-40 d
40-52 c
52-61 b
61-75 a
75-78 s

you can wear below your grade but not above it.

Squire pants can be deleted by draging them over the trash icon in the lower right hand corner of your inventory.

if you are a mystic the only type of closing you can wear is "robe", if fighter it's eather "heavy" or "light". you need to hold pointer on item to see the deascription. Also ork mystics can learn masteries for both heavy and light armor types from lvl 7.
Weight is the little yelow bar at botom of your's inventory window. as long as it is yellow (50% or less) you are fine, if it gets above 50% it turns orange and then red, this way you are in troubles you ether have to sell some stuff or put them in warehouse.