Does the front slot on the CD/Radio work if I have an autochanger fitted too?

Apologies if that seems like a daft question, but I have searched on here & also in the handbook, without finding an answer & didn't just want to throw a CD in & knacker the machine !!!

I've a 2007 Octavia VRS with the standard player fitted.

Yes.

1 press on the CD button for the single cd, 2 for the changer and 3 for the aux port if you have one