Question one, gear and gear upgrades -
For the most part, there isn't a lot of specialized gear in your level range for wizards - I suppose keep an eye out for pieces with intelligence, power, spell damage, and the very few and far between damage spell crit chance. Really though, you don't need to worry about gear that much if you are looking to solo quest your way to level 80. - just root, nuke, rinse, repeat and you'll do fine.
The itemization that will affect your performance drastically starts at level 70+, and of course, there's hundreds of pieces of gear of varying quality at level 80.
There's a thread on this very forum with a lot of information that can help you with a lot of things, including what kind of gear you should be looking for in the end game - here:
http://www.eq2flames.com/wizards/227...rd-thread.html
Your second question - aa lines.
Check the "Wizard dps guide" link on the above linked page for some information on how to spec for maximum dps, as well as lots of other handy information on how to play your wizard.
Your third question - where to solo!
Bam!
Solo Timelines - EQ2i, the EverQuest 2 Wiki - Quests, guides, mobs, npcs, and more
edit: Yes, I am aware that the wizard dps guide is outdated all the way back to rok, but a lot of the aa spec info and spell value stuff can still be helpful for non raiders, since I, and everyone else, are too lazy to make a proper, up to date, tso guide.