I'm from the "New to cooking thread," and >>4 gives the same advice I would:
> Look up a recipe on the net and see if you have the money and if it seems easy to do.
This is what I've been doing, and it works great. Make sure all the ingredients are easy to get, and also make sure to read the directions carefully so you can plan ahead. Generally, I like to find recipes that are simple but have some sort of meat in them, since they fill you up and have good leftovers.
For example, if you buy some ground beef and cook it, maybe with some spices, you instantly have more than one potential meal. You could stick the meat in tortillas and cover with grated cheddar cheese, and eat with chips. Or, you could boil some noodles, heat some tomato sauce, add the beef and you have spaghetti. Put the leftover beef in the fridge, and you can heat it up again for another meal.
As >>3 said, pasta is your friend. Just boil whatever pasta you buy in water and heat up your favorite sauce. If you get tired of just noodles and tomato sauce, I recommend buying a pasta packet with some meat or cheese inside (like ravioli) and a little jar of pesto. When the pasta is done cooking, put the pasta and some pesto in a bowl and mix it around until it's all covered.
As for money-saving tips:
Hope this helps!