IIRC, you can;t fly there with your ship, or from any polanet except Corelis, so go to Corelia and buy a ticket to Mustafar and that should work, assuming you have the expansion that has it.
Cant use your personal ship to get there, but you can fly to Corelia (sp) and purchase a ticket to Mustafar. What level can you go there? I was there on a lvl 10 engineer trader.... its at least level 60 based on the quest I got from the planetary map just inside the station. As the other poster said you have to have the trials of obi-wan installed to go there.
You can buy a ticket to travel to Mustafar from Talus as well, but use you must have purchased the expansion or the Complete Online Adventures Premium, click the link and log into the Station Store to buy it.