Your system is about the size of mine. Mine is a 135 gallon display and a 55 gallon sump. The water pump is used to move The return pump that I have is a Quiet One 3000. Some people like them...some don't. You could also look at a Mag 7 or an Eheim 1262. Any of those will work assuming your sump is setup with the return pump submerged.
For a skimmer...I am using a EuroReef RS135. It is kinda tall, so make sure that you have enough clearance in your stand.
I wouldn't use miracle mud. A thin layer of sand or bare bottom unless you put in an actual "deep sand bed". The light for the fuge can be almost any light. I use a compact florescent spot light in a cheap reflector thing that you can get at WalMart or Home Depot.
I have my heaters in my sump. I don't know if you thought about heaters yet. Mine are 250watt Jagers x 2.
I also have a couple of "two little fishies" reactors. One for carbon and one for GFO. (granular ferric oxide) A phosphate sponge. These are plumbed via a "T" off of my return line. You don't NEED these to get started, but you will probably WANT them later. Leave room for them.
I also have a auto top off unit from
www.autotopoff.com in the sump as well.
That should get you started. I am sure more will chime in with other suggestions. You can get some macro algae for your fuge from members when you are ready, but I would get the tank going and the cycle finshed before you put any macro in there.