Hey all,

I am having trouble with figuring out what will work for the bicycle I'm building up from used parts...any help is appreciated!!

I have attached pictures of the crankset and the rear cassette.

The cassette is a Shimano Dura-Ace 9 speed Cassette 11-23 CS-7700

The crankset is what I believe is the original stock...I'm assuming it is Shimano exage trail 28 x 38 x 48 biospace 175mm (by the way, what does this all mean?? can someone break it down for me?)

My questions are:
1st, does this crankset and rear cassette combination work?
2nd, Will any old 9 speed chain work, or should I be selective on the specific chain...and if so, what would you suggest?
3rd, I still haven't found a decent derailleur in the used parts box...What kinds would you be looking out for? (any suggestions?)

thank you for helping this bike mechanic newbie!!