Hello,
1) xmap_com_vehiclemanager_3_8_2016_07_22 - you can install as other extension, using Extensions: Install in Joomla admin area.
2) qs_classic_vehiclemanager_v1.2_j351 you can install following our documentation.
It full ready website.
ordasoft.com/News/Joomla-Tutorials/how-t...ckstart-package.html
3) ext_sh404sef_vehiclemanager_3.0_2016_03_21 - you do not need install. Your version of component includes all files by default for that plugin
Thanks
Taras