Hoppes No. 9 and a decent gun oil will do, so will CLP. Some members here swear by CLP, some have their own witch’s brew of oils and solvents. And, of course, it’s an endless source of arguments. The military uses CLP.
You should be able to get the Breakfree brand of CLP at just about any sporting goods store.
Almost everyone agrees to NOT use WD-40!!
While a segmented cleaning rod is handy to have in your buttstock, I’d suggest you also get a one piece rod for general cleaning. Of course, we’ve also got members who swear by Otis cleaning kits and by Bore Snakes.
Magazine prices vary so much, I’m reluctant to guess.
A few things, though, about mags. The 20 rounders seem worth a little more than the 30 rounders, probably because fewer were made. Colt’s are worth a little premium for the name, even though most other USGI mags are just as good. Don’t buy any mags other than USGI – except maybe Thermold or Orlite synthetic mags.
If any of your friend’s magazines are 20 rounders, blocked off to 5 rounds – suggest you don’t drill out the rivet to convert them to 20 rounders. These are popular with hunters and might be worth a small premium.
Definitely check out Troys Magazine FAQ in the magazine forum before buying additional mags.
(Incidentally, referring to magazines as “clips” invites attack from the more idle members of the board. Technically, there is a difference. Generally, clips refer to stripper clips.)
A front sight adjusting tool is handy, but not essential.
Welcome aboard!