Welcome to the World of PicoScope Automotive
I hate to go against Technical but im gonna have to on this one.
The 8 Bit Scope will be useless to you im afraid. The resolution will be really poor when looking at Secondary Ignition, you wont get any diagnostic detail at all and the detail will be that poor it could actually hide any irreguarities i.e. an actual problem.
On top of this, you will need attenuators as the scope only has a 20V Input Range therefore you woudnt be able to look at Injectors, Primary Ignition or other circtuis above Battery Voltage plus depending upon you application some LCV's as well as HGV's are 24 Volt Systems so you will be extremley limited in use on this.
I think the biggest issue you will have is resolution, certainly for Secondary, Primary, CAN Bus and signals of this nature the scope will be useless. You really do need a 12 Bit Scope with 4 channels.
On top of this, for Automotive you wont benefit from the software, you could run the Automotive Software next to the T&M but its a lot of work just to look at the Help Pages then trying to compare multiple pages for comparison, reference.
Also as the Scope you have is T&M, you cant use Pico Diagnostics, so in reference to using this scope for Automotive, im afraid you have an extremley limited use scope which i dont feel will give you any useful information.
Sorry to sound all negative but i really do feel the scope will be useless to you.