svn checkout depth

I have an SVN project with tree like this:

/project
    /dir1
        /subdir1
           -file1
           -file2
            .....
        -file1
        -file2
        .....
    /dir2
        -file1
        -file2
        .....
    /dir3
        /subdir1
           -file1
           -file2
            .....
        /subdir2
           -file1
           -file2
            .....
        /subdir3
           -file1
           -file2
            .....
        /subdir4
           -file1
           -file2
            .....
    /dir4
        -file1
        -file2
        .....
-file1
-file2

I need to checkout

• all files from /project
• full /dir1
• full /dir2
• full /dir4
• From /dir3 I need only /subdir1 and /subdir3

Can I checkout these files/folders using svn commandline with some kind of depth? If so how can I do it? Can I add subdir2 to dir3 after a checkout? How can I update working copy created this way? Will normal "svn up" command update only these folders or full update of project will be performed?

What you need is called sparse checkout.

In your case you can:

svn co --depth files file:///project project
cd project
svn up --set-depth infinity dir1 dir2 dir4
svn up --set-depth empty dir3
svn up --set-depth infinity dir3/subdir1 dir3/subdir3

Can I add subdir2 to dir3 after a checkout?

Yes: svn up --set-depth infinity dir3/subdir2

How can I update working copy created this way? Will normal "svn up" command update only these folders or full update of project will be performed?

Yes, svn up will update only these files and folders, that is update depth will be preserved.