1) Like the rest advice use the 2nd link - it will go straight
to the North-south highway, it cost a lot more in tolls but you be
faster and less jam in the crossway. If you still want go by
woodland causeway, once out of custom, it is one way, keep right,
there will be a road that allow you to U turn. After that just keep
following signs to KL , when in JB go slow a little the road is
confusing and road works. Don't worry about getting lost, just as
long as you remember the few states, you just general direction go,
soon or later you see sign to go KL ( Malacca is on the way to KL
so just follow the KL sign).
2) Touch & Go you can get from May Bank. But I never have one,
just alway go to the extreme left box and pay cash. It is as
fast.
3) It is up to you. As you are just driving to Malacca, most petrol
pump guys got used to singaporean paying credit card, just the you
may have to go to the counter to sort it out. Just bring some spare
cash , in case you want to explore rural areas there , some rural
stations, which will need you to key in the pin then sign, those
then pay cash will be faster ....
4) When you at malacca, becareful where you park, some place have
coin meters, some places in city have prepaid coupons that you
scratch instead of punching like ours.
lock your doors, usually I would top up at the last pump on the
expressway when coming back then go into JB to pump when I come
back - to avoid crowds and also there been a few case of crime at
pump station in JB.
Just remember even is you go wrongly, just go straight on, and
U-turn when you can, do not panic and do funny driving. Usually
right outside Malacca Police will have speed traps, so do slow down
a little.
Would advice you to wash your car before you go, if can put rain-x
on your windscreen, as it is now rainy season, if you encounter
heavily rain, if your windscreen if clean and with rain-x that help
a lot.