So, i ran into a little.. no, a big problem. Lets just put it this way: My dk has little to non gold, empty inv, no weapon and crappy lvl 80 gear.. Is there any possible way for me to get out of this hole and get on track again, or is he just useless andi should Re-roll?

Get a life

do 5 man runs as a dps, you should be able to gear up quick and while you may get kicked sometimes for low dps, sometimes you wont. Also work on rep, you can buy stuff for fairly cheap with rep and the quests you do to get the rep will give you some gold.