Check the beginner's guide as the post and people's comments have a lot of good info for people new to FTB
#2 - You basically want to get to 30xp, then take whatever you want to enchant to the enchanting table at Spawn - click the enchanting table and place your item in the slot. You'll see 3 options on the side, which will have the XP it costs to enchant - you won't be able to read what it says - it's designed to be mysterious.
It's usually best to pick the highest level, so just click that one and it will enchant the item. It's luck of the draw which enchantments you get. So some people prefer to enchant a book instead of a tool, that way if it's an enchantment you didn't really want, you've not wasted a tool, and you can later use the enchanted books with a tool on the anvil (also at spawn, along the wall a bit) to put the enchantments you want onto your tools.
3/4). It really depends on what your aims are and how much you want to do yourself vs using other people's machines. But I think a macerator/pulveriser, compressor, power-making-machine (I prefer solar) and furnaces are your main ones to get started. Add a rolling machine if you can (to make the combined alloy plates (or whatever they are called) as it's not that hard to make.
Another good one is the extractor - it lets you get more rubber from the resin, also when you get cells you don't want as byproducts in other machines (eg hydrogen cells), it lets you take out the stuff in the cells to get the empty cells back again.
Last edited by Obsi; 15th February 2013 at 10:55 AM.