It's odd...I have three accounts - all CEs, all activated within a few hours of each other, all on 6 month subscriptions.
#1 - 2,650
#2 - 2,650
#3 - 2,450
I have the 1,000 pt CE bonus, the 7 months of the 150 pts, and the only difference is one of the accounts has only two of the 200 pts months, while the others have three. I won't worry too much until we get closer to the F2P date.
As to the value of the coins...I'd guess that they will be similar to the points you buy for The Sims 3. $1 = 100 points. An XP Boost (or similar item) probably ranges from 10 points - 50 points, depending on strength.
I expect there will also be pets, ship decorations (like the Sith Throne), cosmetic items (like the mask), special vehicles, etc.
It appears that http://www.swtor.com/FREE/features has been updated with some new info - including insights into some of what will be in the Store..