"Do you think you could set me up with a free weight routine to follow?"
Absolutely - we can take some ideas from that awesome site Makedah posted (what inspired my avatar!
) and then post a routine here for more feedback. I love program design.
"Also, should i even bother rejoining the gym, should i just buy a weight set?"
Personal preference- but for me, I like the environment of the gym. Just like in college, going to the library made me more want to study - being around others working on the same goal. If you feel that way also, and it's not an economic burden AND it's not a hassle to get there, then I'd say join. If you are less likely to drive to the gym & more likely to workout at home, consider that. But you also have all that variety at the gym.
"The gym has all those aerobics classes that i love to do, will they 'tighten' me up also,(do they count as cardio) or is there no need for them."
I've been an aerobics instructor for over 4 years! I'm probably one of the only aerobics instructor/Olympic Lifters on the planet. Cardio classes do count as cardio, yes. Step, hi-lo (floor aerobics) & cardio kickbox are great classes for cardio. If you love them, definitely do 2 per week or so (or more if you have time, but don't sacrifice lifting for the cardio too often). If you lift & do cardio the same day back to back, cardio goes SECOND, lift first.
Anything called 'sculpt' 'toning' 'BodyPump (I teach this) / Power flex' etc - AVOID!!! Do NOT TAKE!
I tell the ladies IN my BodyPump classes not to take this. Light weights lifted multiple times is NOT strength training (so if they put 'strenght' in the title of a class like that, they're wrong.) I'd be happy to explain the physiology of this if you like, but just stick to cardio, HEAVY weight training (MOST important), and yoga if you like it. Ignore muscular endurance workouts (since you don't need that for a sport) unless you really love them or something - they won't help your goal of getting tighter.