My addition:
there are three main advantages you can have in poker - these are skill, position, and card. AA is better than 72o, it's nice to be last to act on the flop, and it's nice to play against people who don't know what a flush is. Thing is, that people over-estimate skill advantage all the time, and over-value shit like T8s thinking that it has some innate card advantage. Think about these 3 factors every time you put money in pre. Doing this plus following one of the suggested preflop range things will result in you playing more pots with positional and card advantage.

Now for a few comments on spoon's stuff - which is gold!

I'd go with even nittier preflop ranges for absolute beginners to at least give them a good chance at 2/3 of card/positional/skill advantage. (Aokrongly 19 hands anyone?)

UTG AQs/KQs/AK/99+
UTG+1 add 88, AQo
MP1 add AJs
MP2 add KQo/77
HJ add AT+/KJs/QJs/22-66
CO add Axs, 67s-TJs, 79s-9Js
BU add Ax, JT
SB = Cutoff

re bet-sizing - i play FTP which has bet-pot button, so I'm all for opening 3.5x from EP-HJ, 3x from CO, 2.5x from BU, 3x from SB.

To adjust these ranges for 6-max I WOULD NOT just drop the first 3 positions, I think a beginner is better instead opening the FR UTG range from UTG, the MP1 range from UTG+1, the HJ range from CO and the BU range from button.

Completely agree with your comments on isolating bad players. HOwever, new players tend to a) limp behind too often, and b) iso too often when they first encounter the concept, but before they understand it. Isolating limpers should be introduced into a game gradually

Re open limping - yep, don't do it unless you could explain your reasoning to spoon and expect him to think your reasoning was solid. There. Easy. Get in IRC and give this a go. Every time you open limp. Good luck. Don't do it often at all.

Cold calling preflop in position is cool, but it's easy to do way too often and have no plan whatsoever for what/why you are doing it. Figure that out BEFORE just calling atc that are sorta suited (e.g. both red) or connected (e.g. 8J) or whatever.