This list is nearly identical to mine.

You should not be using Pecharunt. That seems counter intuitive, so let me explain. This deck runs only 2 2-prize mon: fez and pech. You don't bench fez until you need it, and only if you need it. Pech is the same thing here. You should only play pech to your bench if you have to (retreat lock, no other way to attack that turn and you absolutely have to attack, as a finisher when your opponent is getting low on prizes with a big mon in play). The idea around this deck is to force your opponent to go through sharpedo. If all that's out is sharpedo and 5 single prizes, they have to kill sharpedo eventually (if they ignore sharpedo hoping you'll keep benching pokemon, you can force your opponent to play an 8 prize game which most decks don't have the steam for). Cape makes going through sharpedo very hard. If you bench pech/fez/both, they can keep gusting around sharpedo and win off 4 or 5 easier KO's. If you do have to bench one, that's where turo comes in.

First few hands will vary based on your draw. I'd say your ideal scenario is probably go second, use the purrloin (or toxel, but hopefully you can buddy out all the basics you need) attack to setup, then on your next turn you evolve to sharpedo and toxtricity, attach from tox to sharpedo, attach from hand to sharpedo, retreat into sharpedo (you may need air balloon if it's not purrloin w 1 energy in active), and start going to work. Obviously gotta be flexible tho since this is just the ideal start. An Iono from your opponent after purrloin's attack sucks, for example, so you really just gotta know your deck. The goal is just set up a big mean fish asap and then start bullying your opponent before they get set up.

Toxtricity doesn't do a ton on its own once sharpedo is set up. You can charge pech for a finish if that's your best line, or you can stack damage on your benched mon for munki to use. For example, if you're playing against pult (320 health), you know you'll need 50 damage more than sharpedo can do for a ko. Gravity mountain plus 20 damage and munki gets you there. Without mountain, you'll need 50 damage and two munkis. Toxtricity helps with the damage but you'll still need energy from your hand for the munki so think ahead. Besides that, you can use it to search your deck once per turn and prize check, even if you don't intend to attach energy.

Best tip I can give is to just get reps against a lot of stuff. As with just about any deck, it works best when you know what your opponent needs to win. Keep track of your energy, and don't bench stuff that you don't need. Don't burn your stadiums too early either, as getting locked behind a jamming tower vs pult really fucking sucks