Wine Temps

[AZMATT]

I am a newbie to the board and to wine. I know nothing about wines so any help you can give would be much appreciated. I have just purchsed a 30 wine refrigerator.
1. Can I keep both reds and whites in the frige? And what temp should I keep the fridge at?
2. Any recommendations on good reds and whites to keep on hand for guests that will keep for a year, two maybe more around the $20-$50 dollar range?

Thanks
Matt in AZ