tolgao wrote:
. . .
Because how am I going to restore my all of my Applications and related files/folders I installed before ? Is there anyway to do that ?
If you reinstall Lion, that will include the default Apple apps (the ones that came with Lion). If you don't restore or copy others, you'll have to reinstall/redownload them.
You could probably restore them from your backups (although there may be problems with "complex" apps -- the ones that came with their own installers, as they also put other files in other places, and won't work properly without them).
Or, you can run Migration Assistant and transfer just your apps from the backups (un-checking the user accounts).
I thought that when I had bought my TimeCapsule I did not have to worry about restoring my system after clean install.
Yes, you can do a full system restore, but that puts everything back just the way it was at the time of the backup.
But I could not copy most of my <home folder>/Library contents. Is it important ? For example, I could not copy /Library/Keychain it gives error: "System.keychain in use",
You'll probably have to re-enter the passwords kept there, in the new account.
also it does not allow me to copy AddressBook folder content similar to same message given before. But it is weird that content of Address Book there.
Either copy the contents of the folder, or use the AddressBook application to export the old ones (AddressBook > File > Export > Contacts Archive) to a file, then log on as the new user and import them from that file.
I saw a user name ("wheel") which I never created before. I was worried that if someone is trying to hack my MacBook Pro. I immediately removed user name "wheel" from Sharing & Permissions. What do you think about this issue ?
As William says, leave those alone. If you continue copying, once you're done, reset the permissions on the new home folder to the defaults, per Resetting Password and/or User Permissions.
As noted before, if you have other folders in your <home folder>/Library you can't copy, copy just the contents.
It sounds like you've got most everything copied, so your best bet may be to continue. Just don't delete anything until you're sure it's copied and working properly.
Otherwise, as both William and I have suggested, you may want to get some hands-on help.