Goal:
Having SQL server 2012 with Tabular mode in my client computer.
Problem:
Is it possibly to install another sql server 2012 with tabular mode in my computer when I already have SQL server 2012 with Multidimensional and datamining mode in my client?

Yes, but you need to install another instance
http://msdn.microsoft.com/en-us/library/gg471594.aspx