Pics & msg'd, cont'd

Accessories included:
It's too late to do anything tonight but here's what I have planned for the morning:
1) Pick up new beer lines (hasn't been used in over a year)
2) Pick up line cleaning kit (any suggestions on what to get?)
3) Check CO2 level, refill if necessary
4) Should I replace the line cooling tubing? It appears to have mold all inside of it...
5) Pick up a couple of kegs
I plan to take the couplers with me to the keg store tomorrow just to make sure they're in good shape.
Anything else I'm missing? I'm a total newb to this but anxious to learn. Thanks in advance for your help