New car!! Need advice on starting!

Dude when I bought my Valiant it hadn't been started in over a year and had not moved in three. Third hit of the key it fired and i drove it out of the weeds and ruts that had formed from sitting that long and went home. I didn't even check the air in the tires(one had 22 pounds one had 17 the other 2 had 12), half way home I got the dash lights to come on. That was 6 years ago.