The first part is probably very, very weak. I can't imagine it occurring all that often that you have three differently named cards in hand that you don't mind trashing. You would have to have Trash Collector/Estate/Copper/Curse/Something, really, or draw those somehow. Not all that great, especially for $5.
The second part, however, strikes me as super strong, depending on how many cards we are talking about drawing. The curse into Gold thing is okay, but re-ordering the next 10 cards of your deck would be pretty powerful, I bet. I doubt you could make it 10. It has to be more than 5, though, or else were talking about something probably worse than Cartographer.
Interesting concept, although I think the re-ordering some amount of cards power is actually stronger than the Curse into Gold power.
What about something like this:
Trash Collector -- $5
Choose one: Trash a Curse from your hand. If you do, gain a Gold; or, look at the next 5 cards in your deck. You may reveal a Curse from among these cards. If you do, trash it. Put the other cards back on top of your deck in any order.