As for the bankrupt one, missions, as someone else said. I can also give you money. I don't need too much but I have a lot.

1. How do I revive pets without going bankrupt?
A. Don't buy anything! Take the pets out of your party and go to the stables. There, you can revive them for only 100 gold. Make sure they're not in your party!
2. How do I go back in time and attack the bandits in the fungus place instead of miss-clicking and dooming the fairies?
A. There's no way to do that. Go along with the story, you unfortunate fairy doomer! (JK)
3. How do I get more Sylestis? Or more traps, either one works?
A. Traps are EXPENSIVE if you're new. You can buy pets from Sum18mydonut for fairly reasonable prices, and it's cheaper that having a trap fail.
4. How do I defeat the bandits in the mushroom place? I keep dying!
A. I had so much trouble with that! I suggest training at Trollsblight Caverns if you have it, but if you can't get enough experience then go somewhere stronger.