Have a 7lb airplane and I want to put retracts on it but I do not know anything about retracts can anyone suggest what type and where I can buy them

What type do you want? Air, mechanical, or electric? Simplest to use and cheapest are mechanical. for a 7lb plane you can order them from any of the big guys like Tower and Horizon. You will also find air and electric there to. You will also need a special retract servo for mech retracts about $25 retracts will run you about the $15 for a set of mains. Tri gear gets a little more complicated.

You should be able to find something here: http://www.hobbyking.com/hobbyking/s...-Retracts.html

Tailwheel or tri-gear?

If you are wanting to add retracts to an already built ARF, that is not already set up for retracts, it's a major job. You will need to strip the covering and build in mounts, and rib doublers etc.
Might help if you told us what model it is.

I have the phoenix Tucano 60 it is all ready setup for retract

It would appear there is more than 1 version of .60 Tucano ARF from Phoenix. Here are a few build threads:
http://www.rcgroups.com/forums/showthread.php?t=1708708
http://www.rcgroups.com/forums/showthread.php?t=2292015
http://www.rcgroups.com/forums/showthread.php?t=2055611
http://www.rcgroups.com/forums/showthread.php?t=1876082
http://www.flyinggiants.com/forums/s...ad.php?t=93430

I have the one from Tower Hobby for 129.00

Tower sells a nice set of retracts just for a Tucano. http://www3.towerhobbies.com/cgi-bin...&I=LXEUWM&P=ML

They look good thank you