Hey gunsdiesel.
As you are 'getting back into lifting', you might as well start right from the beginning. First thing you want to do is throw out your supplements. The reason is because they are old and that you said you didn't know when or how much to take. Over the next week, eat as your normally would and write down everything you consume in terms of the caloric value, protein, carbs, and fat content. Don't alter your diet during this period as you want an honest representation of your nutritional intake. At the end of the week you will then be able to see, probably for the first time, where you diet is letting you down. Also during this week, start reading up on nutrition, especially protein. Find out what is right for you, the best sources, the amounts, and the optimum absorption times. You are going to need all this for week TWO.
Use the following equation to calculate your Basic Metabolic Rate (BMR). This will let you know how many calories you will need to consume on a daily basis. NOTE: The figure is for an individual involved in no physical activity, so keep that in mind as you will need to increase this figure, as you exercise, to add mass.
Adult Male:
BMR = 66 + (6.3 x body weight in lbs.) + (12.9 x height in inches) - (6.8 x age in years)
From the reading you did in week ONE about protein (don't make me keep you after class, lol) you will now know that you need one gram of protein for each pound of lean body mass and that one gram of protein equals four calories. This is the start of your new diet. An increase of 500 calories per day over the course of one week will add one pound of mass to your body. The key is to make sure this mass is in the form of muscle and not fat. So that brings me onto the next point. Just because you are thin does not mean that you can eat anything and everything. If you are going to do this right then you have to eat healthily. This also means no smoking and drinking. If you are committed, you can do it. Try to keep your fat intake to under 40 grams per day and limit your intake of saturated fats. Avoid hydrogenated and trans fats altogether. The remainder of your diet will be from carbs.
As to your workout program, you will want to group the various muscle groups to days which you will be comfortable training. An example might be:
Day 1: chest / shoulders / arms
Day 2: rest
Day 3: Back / legs / abs
Day 4: rest
Day 5: repeat
After the first month, you will be able to change your routine to a 3 days on, 1 day off split and incorporate more exercises into your routine. Your caloric intake by this time should be more than sufficient to warrant this level of intensity. If you find that you are putting on too much weight, cut back on the carbs and/or increase the intensity of your training. Once you achieve a weight you are comfortable with, start to introduce more cardio into your workouts. Keep track of your nutritional intake as you did in week one so that you know what your results are going to be instead of just guessing.
As to supplements, WATER and PROTEIN are all you need to achieve a healthy physique. If you wish to go beyond this then you can look at other supplements. Just be aware that most of them contain the word 'MAY' on the packaging. (May promote gains in lean mass ... May reduce body fat ... May reduce the size of your wallet ... etc.) So use the knowledge of the people on this forum as well as your own judgement.
Take your time to do this right and ask lots of questions along the way.
Best of luck.