Eat as much good stuff as you can, but also eat a heap of shit.. you say your scrawny. Just attempt to stack on the weight.
I used to be heavily into working out and still am to an extent. i had it easy though, i began seriously fat. Go buy yourself a no name brand 50+kgs weight set with dumbbells and a barbell. that is all i have and its more than enough to start you off.
Bicep curls, overhead tricep curls, fly's, benchpress, clean and jerk, pushups on barbell, dips, situps, crunches, shoulder shrugs, shoulder lifts etc will all help..
Here is a nice basic workout for you for around 35 minutes:
Begin with stretching, proper 5 minutes of it. Start with 5kgs on each dumbbell. Feet at shoulder width, keeping dumbbells horizontal lift arms to shoulder height slowly and back down slowly. Do this 10 times, each time as slow as the last. Put down the weights, swing your arms around three times and repeat process untill you have done 3 sets of 10 reps.
Now for the biceps. With however much weight you feel comfortable with, stand, once again with legs shoulder width apart, this time its a bicep curl. do one arm at a time and 10 on each for three sets.
Then pushups, 3 lots of 30, then another 20, then another 20, then another 10
Repeat this ALL TWO OR THREE TIMES
Also if your wanting good muscle food, skinless baked chicken and light salad is good, also tuna pasta bake is very protein based. Don't drink raw eggs.. thats stupid as too many eggs a day can do you damage.. i suggest maybe have an boiled egg with no salt or sauce etc.. if you keep it up then you WILL gain strength and bulk a bit.
Hope you enjoy