I´ll give some help about the brands. I had this doubt back when I bought all my stuff, the tutorial is great but I think people can get a clear idea if they know more about brands, so here I go:
1- PENCILS / MECHANICAL PENCILSUsually artist like softer pencil, like 2B, 4B, 6B and 8B, they create smooth lines and are very usefull for shading. While Illustrators are more comfortable with mechanical pencil because they´re harder and can create very thin lines. But THAT´S NOT A RULE! You may choose whatever you find good to you! I personally love both.
You dont need to carry over 9000 pencils to be a good artist, so keep in mind what you think you´re really gonna need before going out like a shopaholic and buying all pencils from the art store.
But there are few thing you gotta keep in mind before buying your first pencil, like the wood of pencil, there are 3 kinds of materials used for making pencils:
Pencils made from Incense-cedari (a renewable resource) are a reddish brown inside with a smooth, fine grain and a visible seam. They also have that familiar cedar scent when sharpened;
Pencils made from plastic have a pinkish color with no grain or seam, because plastic composite pencils are extruded by machine.
Pencils made from tropical rainforest wood have a brownish color with little dark brown or red flecks.
ALWAYS REMEMBER TO NEVER BUY PLASTIC PENCILS! They are awful! They break very easy and are terrible to shape, pencil made from cedari are the best option!
For someone who just began to draw and are not really sure if want to keep the habit or take it very serioursly I´d advice you getting the faber castell HB, 2B and 6B pencils, this little green one:

They are cheap, the wood is good quality, and the mine is great, even if they´re not pro they are a great option for those who seek fun and dont want to spend much money. Also with only 3 kind of pencils you can start your drawing life pretty ok, and with time you may find the need of buying other kind of pencils. It´s all up to you.
If you want to spend a little more of your money you can get professional pencils from the brand called Koh-I-Noor, they are great pencils but are more expensive, since it´s an artistic line, you will probably find every size you may need, from F to 8B.
Here´s a pic of then:

You can find more usefull information about pencils researching on google or going at the library! Pencil history is really fun.
Of course there are other kinds of pencils, like watercolors pencils, pastel pencils, etc. But I´ll just keep to the basics :~
Now let´s get a vision about mechanical pencils.
They are very helpfull, some artists dont like, some love, but again, you are the most important person in your life, so you will decide whenever you like it or not.
For beginners I´d advice getting a brand called "Pentel" they have a good range price and will last for your entire life you take good care of then. Also its good for the start only getting an 0.5 or 0.7 we will discart the use of 0.3 now because you dont know yet if you´re gonna keep drawing or not. So just keep in mind that mechanical pencils CAN BREAK, so take good care of then.
Here´s a pic of a mechanical pencil:

If you´re a rich person and want to go pro, you can get mechanical pencils called Alvin Draft

Since I´m not a rich person I just ignored then and I´m very happy with my pentel yeea!
Now that´s the ending of my little vision about first buy and pencil brands, if you found it usefull just tell me so I can make a review about erasers and other artistic stuff!