need a price range for all these items...

You obviously have internet access. Look them up. There are plenty of web sites that sell equipment and each thing that you have listed could fit within a huge price range. I find the results more believable and gratifying if I do the research myself.

Not to be rude, but do it yourself.

Let me tell you how much I paid. I bought these items at a LFS and can provide you an approximate cost.

1) 1 - 1.5lbs of live rock per gallon-45lbs- I paid $5.99 a pound for rock. Bought 60 pounds for 55 gallon tank.
2) 30lbs of substrate, not crushed coral though..go for aragonite sugar sized grain sand. Helps well with keeping the pH in balance- I paid about $1.50 a pound for 60-70 pounds. I bought 3 large bags plus 1 smaller bag.
3) Protein skimmer- I paid about $100 for a CPR Backback
4) Powerheads for water circulation- Didn't buy any initially but got two later for about $20-30 a piece
5) Lighting - this will depend if its just fish or you intend to have corals- Bought the VHO flourescents which attached to a hood that I got with my tank. I spent about $300 I think.
6) Hydrometer- $20 for dip in water
7) Test kits for Ammonia, nitrITE, nitrATE, pH..Other may be needed if corals- $40 for Red Sea test kit. Don't like it since I have problems with reading the colors.
8) Thermometer - not the stick on type, they are waste of money- Digital thermometer with a probe that goes in the tank. Thermometer is outside of the tank. $25.
9) RO Unit to produce clean water- Didn't get one. Buy my RO and Saltwater from LFS. RO at $.25 a gallon. Salt at $1 a gallon.
10) A container for mxiing saltwater in with a power head and heater- Didn't get one, see above.
11) Heater for the tank - best off with a titanium type, 200w- Bought 150 W on clearance at LFS for $20. I live in Southern Calfornia so the heater is less important than other places. Don't have a problem keeping tank at the temperature. In fact, may need a chiller at some point.

Hope that helps.