It really sounds like you have too many questions to answer here. I would suggest that you read the manual several times, and if necessary, find a local technician who can help you. But, to try and answer a few questions:
1. Spdif ?
2. Word clock ?
3. Analog ?
1 : RCA jack/phono 2. BNC 3. XLR or 1/4" jack
So its mean that for synth or somthing that unbalanced i need to make cable balanced cable with XLR To Ts unbalanced ?