welcome.
all the answers you got this far are wrong… - and right. it depends… on you. and on you alone.
i know just one rule, that is universal: it is (will be) your railway. it has to please you! (well, and the missus…)
you must ask yourself some questions. once answered, we others can help you with details.
let’s see…
are you fat? - if you are really fat, everything lower than table high won’t please you for long. even, if you’ve got just a little beer barrel to carry around, will it be fun to kneel, if you have to draw your weight up again?
so, if you are not a skinny little squirrel, maybe buying just half as much track for starters, and using the spare money for some bricks or cement blocks to build a “provisional” (normally seven years or longer) elevation, could help you to stay interested.
are you lazy? - easy chair, sixpack, straw hat, observing trains go round? then go plain old DC analogue.
are you a passionate gardener? - just wanting trains as addition to your lovely garden? seeing trains go round, while you mow the lawn, weed, plant… same: plain old DC.
do you like to play? - freight yard, fiddling up and down to build up trains, or break them down? then you need some control. either DCC or battery with RC.
do you love your soldering iron? interested to learn, how your toys look on the inside? - go battery.
what do you want to see? trains snaking between your tulips and your roses? - level zero is yours.
or do you like trains passing on or below a gigantic trestle? - grades and elevations are in your future.
track:
specially in 1:29 the standard (332) brass track will look oversized. smaller track or even 332 SS track will look better - at a price.
on the other hand, if you do not plan to become filthy rich in the near future, standard brass track looks just fine.
the cheapest way to get track is hunting down R1 curves. (those, that make a four foot diameter circle)
most of my track are re-bent R1 curves. three dollar or less per foot is a normal price for them. sometime you might even get the jackpot… a dollar per foot!
oh, and don’t copy my mistake - building an huge layout, that never gets done!