TCL toggles the collision logic of the character, not other systems. For examples, NPCs don't suddenly fall through the world because you use the TCL. The collision logic is still there for them. That means that you cannot clip things through other things without the use of other console commands.
AFAIK, there are no console commands for moving objects to a particular location, only spawning them on your character's head, which doesn't seem conducive to what you are trying to achieve, TCL or no.
I don't have access to the game myself, so I can't test it, but it is possible that the objects you are building would attempt a collision interaction while clipping, causing them to behave erratically and possibly giving inertia to other objects as it tries to reconcile. I would advise you to make sure that the objects you are building and spawning with console commands are not subject to physics before you try clipping them through walls.
Also make sure that the objects aren't interactable by NPCs. For example, if an NPC steps into a bed that you clipped mostly through a hillside, when they exit it, they might get permanently stuck or fall through the world, never to be seen again.
To access console commands, you need a Fallout 4 game that you can run on PC. Most console modes are opened through the [~] / [`] key under the [Esc] key and above [Tab]. However, it is possible that your country has a different keyboard set-up. For that, you should consult a wiki to find the right keybinding. AFAIK, you cannot change this keybinding; it's standard across all keybinding setups.
Misc. Tips: Console commands can only be entered manually and they cannot be copied or pasted. Any keystrokes that you enter, even if the window is closed, it will record in your command string.
However, while you cannot copy-paste commands from outside the game, you can use the arrow keys to select a previous command you have given. You can use that to correct commands that didn't work previously. For example, when you type player.spawnatme 00015d7e instead of player.placeatme 00015d7e , you can hit the up key to change "spawn" to "place" without having to look up the code again. You can also use this to use the same command in quick succession, such as the "disable" command to turn off an object.
The number pad or numpad on the right side of your keyboard won't work in console commands; you have to use the keys in your character keys (the same block in which you type letters).
If you need to enter base ID codes to spawn particular objects, it is advised that you use windowed mode and prepare the code beforehand on a .txt file next to your Fallout 4 window. Alternatively, you can [Alt]+[Tab] between your Fallout 4 window and your internet browser, but remember that each [Tab] counts as a keystroke for the console commands and will have to be manually removed once you [Alt]+[Tab] back to your Fallout 4 window. Your mouse is constrained by the window, so any browsing requires an [Alt]+[Tab], which is why a .txt file is preferable.
If you have a 1920x1080 resolution, a 1280x960 resolution in windowed mode should allow you enough space to fit a .txt file next to your Fallout 4 Window. Or YouTube videos if you need additional instructions.
I hope that helps! If you'd like a step-by-step, let me know.