Q1 Hard: Turn 1, CCCEE. Buy Doctor, overpay 1 with Baker coin token, trashing Estate from top of deck. Draw CCCC[shuffle]Doctor. Turn 2, play Doctor naming Estate.
Q2: Turn 1, CCEEE. Buy Expedition with Baker coin token. Draw CCCCC[shuffle]CC. Turn 2, buy Mint.
Q3 Hard: Open Treasure Map/Market Square. Play Treasure Map, discard Market Square to gain Gold.
Q4 Hard: Open Estate, reacting with Hovel.
Q5: Turn 1 Nomad Camp. Turn 2 Necropolis Nomad Camp buy Peddler.
Q5 Hard: Turn 1 Stonemason/Nomad Camp/Nomad Camp (using Baker coin token). Turn 2 Necropolis Nomad Camp Nomad Camp buy 2 3 Peddlers.
These are really good! Got all but 2 Hard, except maybe you can argue with 5, and I think there's another intended solution for 4.