I've never had any problem using regular oil and my car doesn't burn or leak a drop, I used to check the oil religiously but now I just check once in a while and it's always fine. As for tires, my suggestion is real summers and winters (although the Pirelli all seasons I had before really weren't bad at all). Right now I am using Potenzas for the summer and I've been really happy with them so far.

Congrats on your new ride!