Is that your first contax camera?
1. 點樣set包圍曝光呢? turn the switch below the exposure compensation dial to +/-1, 0.5 etc.
2. iso下面粒制有冇用? you have to press it before you can change the exposure mode such as Av, Tv, M ...
3. 個輔助對焦指示除左d格仔之外有時又有d虛線,係代表d咩呢? one line is the depth of field at your set aperture. the other indicates where your object is. u have to make sure that the object is within the depth of field at your aperture to ensure the object appears clear.
4. 我上筒film(dx film)之後部機唔識轉iso,係咪壞壞地?? if the film is still in, i do not think you can change the iso. the dx will just follows the iso of your film.
5. 如果要買ttl閃光燈&飛燈線,大家有冇好提議呢?大約幾銀度? have to ask other brother here. i am not good at flash photography.
6. rx有冇出電箱之類嘅野呢?佢粒電好似都唔係周圍有得賣.... there is a battery holder for RX. but i forgot its name
the below catalogue maybe useful to u :
http://www3.xitek.com/catalog/contax/rx/c-rx.htm