Red/Black Agrro standard deck help

So without delving too deeply into changes I would make, which I can do of course, I figured I would answer the question you have at the end.  M13 is no longer Standard legal.  It rotated with the Innistrad block as soon as Theros became standard legal.

That being said, what is the goal of this deck?  Are you going to just keep playing casually, just within the standard format or were you planning on sleeving up for FNM?

My biggest suggestion for newer players (at least to the competitive environment) is to scout out your LGS and possibly a few other FNMs to see where the environment is most welcoming.  Some FNMs are full of people who are just dying for the next Grand Prix, Star City Games Open, or even Pro Tour Qualifier - and as such, the FNMs are loaded with super competitive players who are essentially just seeing how well they can pilot the latest and greatest net-deck (you wonder why some cards have massive jumps in price, that's why... look at Chandra, Pyromaster and Thassa, God of the Sea as recent examples).  For newer players, these types of environments will simply turn you off of Magic and nobody wants to see that (winning certainly isn't everything, but it gets REALLY old getting blown out game after game after game).  Now, if you're lucky or look hard enough, you'll be able to find more relaxed FNMs that will cater more to the home-brewing, playing the game to have fun crowd.  This is where I think you'll be more comfortable, make more friends, make more trades, and overall just enjoy the game and its players more.  Keep in mind you might have to dig around a bit and likely at every FNM you'll find someone who is super competitive, but try to find a more laid back place to play or it can really just ruin the experience.

Having said all of that, I'll let you get back with regard to where you intend to play this before I give specific comments as they'll hinge on the play environment.

Cheers!

So to be clear you're saying that your eventual goal is to take this deck to a GP?

Alright, so again, this will depend on the level of competition at your local FNM.

But if you want to be competitive, a LOT of the deck as it currently sits will have to go. 

One thing to remember is that the most consistent decks have 3-4 of most cards because that increases the consistency with which they'll draw them.  As such, you'll want 3-4 copies of the cards you identify as being best.

The next question is which of the three major archetypes you'll want to play.  Among your choices are aggro, where you are just trying to kill the opponent faster than they have a chance to respond; mid-range, where you tend to stall just a little bit and end up playing some major creatures/spells that ultimately just put the game out of reach; or control, where you tend to use most of your efforts to clear the board or otherwise to "control" the flow of the game until you ultimately drop a single threat that just wins the game.  Aggro is naturally the fastest type of deck, but one which either wins big or goes down in flames (there are a lot of times where an aggro deck just isn't going to get there and you have to sit there watching helplessly).  Mid-range is arguably the most versatile, but frequently loses out to control matchups as they're both trying to slow the game down a bit.  Control is grindy, there's no better way to put it - these are the decks that often go to time during rounds or otherwise take 15-25 turns to win games.

With 4x Rakdos Cackler you have the startings of an aggro build, but I'll let you think over which archetype you want to run before delving too much into specific card choices.

I edited the deck a bit.

Is Modern MTG format less common to see at tournaments?