A little help please

My youngest Daughter called last night and told me it was time for a bigger tank. She bought me one off of craiglist for 200. well if I did my math right this tank is 180 gal. 72 1/2 x 24 1/2 x 25 5/8. It came with a stand and t5 lights. Never had a tank bigger than a 75 so I don't know were to start. What type of Filtration system do I need. What type of heaters should I use. I have been thinking about trying live plants. I read some where that you should have a c02 system for that. I just need to know how to set this big boy up.