Rich Infrastructure

Hi,

I'm a bit lost here.

I got the game, I've even been recommended to start out

with some "sandbox mode" that would unlock all buildings,

but for some reason I cannot build a beautiful city even

half-full with infrastructure such as those that appear

on some Youtube videos like :

URL : https://www.youtube.com/watch?v=ehK9oyMTyOg
     (+) titled : "Somewhat Awesome Games"

                       They seem to have one or two big buildings on time mark of 00:05
                       that I can't find available in my own installation.
                       They also have a nice train on time mark of 01:37 -- how can I
                       "convince" a train to ride the tracks I'm building ?

URL : https://www.youtube.com/watch?v=LC3s67H0dHo
      (+) titled : "SimCity (2013) - Transport Efficiency | SimValera"
                       They seem to have, on time mark of 00:58, those "street cars",
                       that are the only type of urban train available when I start
                       a new city, but unlike a new city, I do NOT seem to have access
                       to other train types such as a monorail on time mark of 00:39,
                       or a zeppelin on time mark of 02:09, or any of the big skyscrapers
                       that are all over the city.

My question is :

Are there any cheats I could use, to make a leap directly
to being able to build large cities with lots of
infrastructure, train types especially ?

Thanks much in advance
GB