Nipple% Route
Coin Route
Outside Tower
After the Cappy cutscene take the coing ring you get from pulling out the woooden pole. Then you grab the coins behind the crates in the top left. That should be enough coins from outside the Tower. If you want to be safe you can also collect some coins from behind the posters near the crates.
Inside Tower
From the beginning do 3 neutral dives and turn right. This should align with the coin block to get 10 coins. With the frog you can try to collect as many coins on the fly as you can.
Top of Tower
Grab all the coin on the way to the top that spawn after you collect the first coin. Just walk up. Dont try to roll otherwise you might be to fast. And for the Topper fight you want to grab the coins he drops after you hit him. Kinda just spam the spinthrow and walk around a little bit.