These maps are scans from Nintendo Power. I cut out all the words and stuff to save on memory size, but I typed down what the numbers correspond to.

Turbo Tunnel - 209 KB
(1) KEEP YOUR EYES ON THE ROAD
This map shows the first four sections. There are 25 obstacles in the fifth and final section.

The Snake Pit: Room 1 - 33.2 KB
(1) ROCK ON
Land on these rocks before the snake disappears, then wait for a green Snake to slither in from the left up to the exit.
(2) HANG ON!
There is nowhere to go when you reach the wall, so keep hanging on until it disappears completely into the wall. When it disappears, another will emerge below.

The Snake Pit: Room 2 - 24.7 KB
(1) QUICK STEP
After you make a last-minute leap from Snake C to Snake D, you'll have to duck to go under the wall here. As D disappears into the well, Snake E will appear above. Jump quickly to land on it. Snakes E, F and G are all super speedy slithers, so bound quickly from one to the next. Continue up to Snake H above.
(2) UP TO THE EXIT
Drop down to Snake I as H disappears, then ride it to the right. When it takes a sharp dive, wait until the last moment and lover over to the emerging green Snake, right.

The Snake Pit: Room 3 - 24.5 KB
(3) HUG THE WALL
Ride A up and over against the wall. Hold Left on the Control Pad to keep from being pulled to the right as you drop from A to C to D to E and finally down to F.
(4) KNEEL UNDER NEEDLES
Kneel to avoid the spikes here, then jump over the pair just before you reach the exit.

The Snake Pit: Room 4 - 30.6 KB
(5) SLICK MOVE
This is one cool pit. Start on Snake A, then leap up and over the spike at the left edge of the ledge. Be careful--the surface is icy. Get a running start and slide under the spikes on the left and onto the same Snake as it emerges.
(6) SLIP OUT THE EXIT
Work your way up to Snake J above and ride it across to the exit. Jump up to the ledge and star running to the right. Duck as you slide under the spikes and out the door.

Ride the Roller Coaster - 54.9 KB
(1) READ THE ROAD SIGNS
If the sign says "Danger," you should take it seriously. In this case, the danger ahead is a low wall. Press Down on the Control Pad to lower your Toad so he won't have a head-on with a big beam.
(2) LOOK TOAD--NO ROAD!
Hold onto the handlebars, your Toad is leaving the road. When you come to broken tracks, press either the A or Y Button to jump the gaps.
(3) TIME TO BAIL
A sign posted just before you this point says "Bail Out!" You don't really have to throw in the towel, but you do have to prepare for a couple quick jumps over the large gaps in the track. Press Y or A to leap.
(4) UPS AND DOWNS
Low walls and broken track here make you quickly duck and jump, but you can't jump immediately after you dive under the low wall. The momentary lag in the play control can be deadly. If you have enough power left in your hit meter, it might be better to take damage from hitting the walls so you'll survive the jumps.