Triathlons.

Hello my fellow swimmers: I am sure that some of you out there are doing Triathlons. I started doing them this year. In June I did my first one, then 2 more in July. There were Sprint Triathlons and they were fun and very rewarding for me. I am 52 years old and I have always been swimming. In my mid 30s I competed with the Masters for about 4 years and I loved it. Some family situations changed and I had to step out of the sport to dedicate some time to help my daughters, but now, I am back in the pool and loving every minute of it. I don't have much time to swim, maybe an hour 3 times a week, and now, I have taken biking and running as well. I do believe that most of the people who do Trhiathlons are just regular people, with jobs, family, children, grandchildren, (like me, I have 3) and even if we dont qualify as the Elite, we put our hard work and dedication into this sport to do as good a job as any. My goal for next year is to do the Chicago Triathlon, in August. So my question is: How do I build up some endurance in the bike and running. My weakest thing is the run, although the bike is also grueling. Swimming is no problem. I am able to swim 1 mile in about 25 min at the pool but the bike and the run are more difficult for me. Also, WHAT DO I HAVE TO EAT?????? I don't really eat anything special, I love cheese and I do eat fruits and veggies. meat and fish so, is there any special food I have to eat more of? I know I have writen a lot but well. I just want to post my back grownd so the people out there with more experience, can give me some advise. I dont want to loose weight, I am now at 130-132 lb. I am about 5' 7" tall. but I dont want to gain any either. I want to get to eat foods that will give me the energy to last without making me feel to full, when I am riding my bike or running. Sometimes I feel hungry in the middle of the workout so I know something is not right. Any way, thank you so much for any info. Maria