Hi,
If static default route is configured in inet.0, then traffic to internet should be ok.
set routing-options static route 0.0.0.0/0 next-hop 1.1.1.6
Am not sure what you meant by "still not the routes in the virtual-instances".
However, it is also possible to exchange other protocol routes using rib-groups, i.e use rib-group to exchange the static default route to inet.0.
http://www.juniper.net/techpubs/en_US/junos14.2/topics/example/routing-table-import.html
Could you elaborate on the requirements.
Cheers,
Ashvin