first off let me say is craigslist.org is your friend.
secondly i really suggest you read a lot before you dive into saltwater because mistakes cost a lot of $$.
since you have the tank and stand here is what you need to buy.
-lights (t5s would be perfect for soft corals and LPS)
-over flow (useless you want to drill holes in your tank)
-sump w/ live rock and chaeto (sumps are great because they can be set up cheaper then canisters, they can be custom tailored to your needs and they hide your heaters)
-skimmer
-heater
-1 or 2 power heads
then:
-test fill empty tank w/ water (make sure there are no leaks) then empty
-fill tank empty tank w/ ro/di water and mix salt solution w/ heater and power head running.
-leaving running for a couple of days and test for salinity. should be around 1.025... if low add salt, if high add more ro/di water
-add sand and wait until it settles
-add live rock (rule of thumb 1 lb of live rock per 1 gallon of water)
-start cycle add raw shrimp (placed in a panty hose to avoid a mess)
-test your water... ammonia spike (start of cycle), then nitrate spike (middle cycle), and then traces of nitrites (close to end)
-cycle should take about 1-2 months.
-add CUC (clean up crews)
-add fish (slowly)
i'm sure i'm missing something, but that is the jest of it.