@valerostudio said:
First off, welcome, if you truly want to learn how to make renderings like this then you will need 2 things.
Time
Patience
Here is a starting point to answer your questions specifically.
The leaves and plants are no way SketchUp. These are most likely hi poly models purchased on the web and rendered in Max. The wood floor is probably something where the boards were modeling in 3D and a hi res texture was used to map the wood texture. The concrete looks like an Arrowway texture.
http://www.arroway-textures.com/
Now these answers really only tell about less than 1/2% of the information you need to make images like this. The first image you posted probably was modeled in 3D Studio Max or SketchUp possibly and then imported in Max, materials and textures were probably custom from Photoshop and then VRay materials made one by one, then the lighting and rendering probably took 1/2 day to setup. Then I am sure there was a lot of post process in Photoshop.
I started as an architecture student and when I graduated I decided to focus solely on viz. I have been using VRay for 5 years and I am still learning. If this is truly what you want to do, then you need to make that choice now and start the focus. I think there are few licensed architects practicing architecture and making renderings like this. I may be wrong but I just think as much time needs to go into learning all the tools and concepts to make a rendering as you would need to invest in becoming a licensed architect and there are only so many hours in the day.
There are plenty of resources online to learn VRay and post work. Evermotion has a great 2-part video series on SketchUp and VRay. I would start there.
Thank you, helped me a lot. First you need to see how it's done only then you can start learning the right way.
Have a nice day!