Unzip the package which you installed from Themeforest (themeforest-6298283-tattoo-studio-responsive-joomla-template.zip). You will see a help documentation folder and a one click install package.
To read the help documentation, open documentation folder and click on index.html file.
You can install pkg_ttstudio.zip file as a single extention. There are 8 component and 1 template zip file in it.
Note: To upload one click install package, your server should allow clients to upload minimum 10 mb. If you are getting an internal server error during the installation, you should contact your hosting provider.
You can also upload each zip file one by one. To do this unzip pkg_ttstudio.zip file. Open “packages” folder. You will see component and template zip files in it.