These rulebooks are for the strategy battle game (sbg). It is a skirmish scale game where you control each warrior seperately. War of the ring (wotr) is a company based game, with movement trays. I would go for sbg first, as it requires less figures.
The most up to date rules are the one rulebook:
http://www.games-workshop.com/gws/catalog/productDetail.jsp?catId=cat450005a&prodId=prod1140214And the mini rule book in the MoM:
http://www.games-workshop.com/gws/catalog/productDetail.jsp?catId=cat450005a&prodId=prod1140216(They both have the full rules, the one in MoM just has less profiles and some hobby tips. The other profiles can be found in sourcebooks, and there are lots of hobby tips around the net.)
For the forces, look to the right hand side of the page, under lotr forces, then you can choose what faction, and then troops/heroes/monsters etc.
http://www.games-workshop.com/gws/catalog/landingArmy.jsp?catId=cat460002a&rootCatGameStyle=