What do you mean by “doesn’t work”? Maybe you could describe in some more details what you’ve tried - what exactly did you copy and where did you paste it? You can copy your templates folder into your new vault.
For your settings, there is a hidden folder called .obsidian within every vault which contains all your settings - replace the settings folder of your private vault with the one from your work vault. This should already contain the information in which folder your templates are located. If not, be sure to activate obsidian’s template plugin and, in the plugin’s settings, point to your template folder.
It would have been helpful, however, to read the help docs first - especially if you are new to obsidan. You could have found the relevant information here and here for example.
I copied the plugins and themes form my desktop to my private obsidian folder with name “.obsidian.” And replaced it , the new folder contains now all the plugins I use like calendar etc. After the synchronization, I restarted Obsidian. But still I cant see the plugins or the themes there.
I have just one Hidden Folder with the name .hidden, which I cant open.