were to begin, firstly its going to be a shock to your system presuming you havent run before or for a while.
eating advice i got was breakfast for a king, lunch for a prince and tea for a pauper, couple that with no carbs after 2pm, oh and dont foret plenty of veg where you can plus loads of nuts and plenty of fluids, i find drinking cordial helps the fluid go in (can never drink as much water as i can if their is cordial in it)before running and especially after make sure your piss colourless, like water from a hose pipe
footwear is next, find out what your foot type is and what shoe you need ie if its full/half cushioned, motion control and i cant remember what type the other is, anyway a good running shop will help with this or a physio, runners in new ferry used to offer an assessment for free if you bought a pair of trainers, best not go to jjb because they wont have a clue.
i wont bable on about training as i dont know what you have done, let me know and i can put my 10 pence worth in
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