I am interested in getting fit and my friend recommended hiking.  Do you know much about it yourself?
I do actually. I like to go backpacking and trail hiking, especially in the Rocky Mountains.
wow that sounds exciting!! what equipment would I need to start off?
Well when hiking a long trail, at a minimum you would want a tent, a sleeping bag and a sleeping pad. Of course you'll also need a backpack to put them in.
ok I think I will need to go shopping!! How long would you go hiking for? how many days?
Perhaps a few days would be a good start. No need to start off with a thru hike of the Appalachian Trail (2200 miles!).
oh I think I would need a few practice runs before I try that!! haha what is the longest one you have tried?
Thru-hiking
Thru-hiking, or through-hiking, is to hike an established end-to-end long-distance trail with continuous footsteps and completing it within one calendar year. 
In the United States, the term is most commonly associated with the Appalachian Trail (AT), the Pacific Crest Trail (PCT), and the Continental Divide Trail (CDT), but also refers to other end-to-end hikes. The Appalachian Trail Conservancy defines a through-hike as one completed within
a "Billboard" interview, Norwood further commented about the track, saying:
"I just felt like, [when] being gone for such a long time, you need to come back with something strong and shock people. Make them go, 'Wow, who is that? Oh my God, that's Brandy? I didn't' even know she can sound like that. Didn't know she would do a song like that?' Because It's completely different than anything I've ever done.