I've created a KVM VM using
virt-install. There is an image file in the directory
How do I access the virtual machine and turn it on? Do I need to assign an IP address, and if so, how do I do that?
What distro are you using? Debian? Centos? Arch? Ubuntu? Suse?
I can recommend http://virt-manager.org/ (older versions can be found in your package manager at your distribution of linux) Very good tutorial can be found here: http://virt-tools.org/learning/start-install-with-virt-manager/
All basic operations with KVM can very easily be done with virt-manager. It is easy, fast and quiet safe for newbies.
All others possibilities how to control KVM can be found here: linux-kvm.org/page/Management_Tools
But i tried some of them and did not working.
If you used virt-install, you're using libvirt, and you can use virt-manager to manage and view the VM.
If it's for the same architecture, you can start it with something like
means use same CPU as host machine
use 1GB main memory
this image is my first hard disk
There are many more options listed in man kvm.