1. That's the entire purpose if it, why would you go into a shop f you didn't know how much money you have? Also that's generally a reference for other people if they want to sell you something but don't know how much tc you have.
2. I don't even understand what you mean, I have a slow internet the Torishop still loads fast as hell. It's literally just fetching data, and that takes nothing. I think you mean your computer is slow.
3. The Torishop is meant for previewing colours. There's nothing to fix in it, other then adding Hunter and Static to it. But most people already know what those look like.