Please ignore the previous d-bag poster. Good for you for wanting to get back to a healthy lifestyle ! That's the first step.
A trainer told me: "You can't out exercise poor nutrition." Focus on eating clean, nutrient rich foods- no need for protein shakes or supplements at this point. Simple foods (vegetables, proteins, fruit)- minimal sweet/sugar and you'll see weight drop if that is your goal.
Getting back to fitness: no need to join a gym initially unless that is supermotivational to you.
YouTube is excellent for home strength workouts. If you are pressed for time, the Live Strong functional fitness videos are 35 minutes, challenging and you only need your body weight:
http://www.livestrong.com/myplate/dashboard/workouts/
If you want to run again, download the Couch to 5k app. Can get you back to road running, injury free. As a former athlete, resist the urge to push too hard in the first month. You'll just end up injured and sidelined.
Sign up for a 5k that is fun- the Wipeout 5k is in June and had running plus ridiculous obstacle challenges that you can train for but don't need to kill yourself to train for. I did a Tough Mudder and it was great, but I had to do 3 hours of daily training on the weekends to get to a decent performance level. As a previous poster said, when you get older, results take longer. (I'm 41 and a parent- time is definitely at a premium).
Enjoy the Spring weather and good luck to you- you can totally do this!