When I do ifconfig in terminal, I see lxcbr0 on. Upon googling I see that its like a Vmware. Is it this set-up by default because I did not set it up. Since its on, does this mean someone has remote access to my computer?
On many Linux distributions, the LXC package will install startup scripts that pre-configure a bridge (basically, a software virtual switch) for use with LXC.
LXC is a set of tools for working with Linux's infrastructure for jails/zones/sandboxes. It builds on the same APIs used by Android to sandbox applications, for example. Some people use it for a lightweight linux-on-linux virtualization, but it is not the same thing as type 1 or type 2 hypervisors at all.
If you don't know what LXC is, it most likely got installed along with something else, such as virt-manager, which requires libvirt, which often requires LXC.