Back when I was in Boy Scouts, I did tons of backpacking and even went on up to Philmont, which, depending on your trip, for me was like 10 days, 70 miles or so.
Anyhow, been a few years since I have done any camping much less backpacking. But, if you plan on being gone for five days without cooking, to be frank, you aren't going to make it.
You want to get a backpacking stove. You may be able to pick up a cheaper Coleman stove for like $40 or so. That has the fuel part connected to the burner.
For a more serious backpacking one, look for some lighter weight model that has a fuel canister that is seperate and can connect to the burner such as this:
Whisperlite
Unless you plan on doing a lot of backpacking in the future you can use some cheap aluminum pots and pans. You should be able to find some stuff at a local sporting good store, or better yet a camping place.
If not check out
REI
or
Campmor
But, basically food=energy and that is a good thing.
Also, if you hike 10 miles, or whatever, then as tired as you may be you want to eat and eat well.
Pasta is good, but don't skimp on protein. Canned tuna and/or chicken would be great mixed in with some pasta with maybe some lemon/lemon zest and dressing
Good luck!!