I have a time machine backup of my early 2011 macbook pro OSX system with mountain lion, I want to remove it's hard disk and replace it with SSD, I have a spare memory key, is there a way to restore data from hard disk to SSD without downloading full mountain lion image, I tried downloading it but Apple servers are too slow, I am getting a speed of 50kbps for a 4.37 gb download, my internet is fine and I have a 10Mbps connection.
You also can use Disk Utility to image the drive if you don't want to use a third party product like SuperDuper! or CarbonCopyCloner. Some people also prefer a simple USB to SATA connector and you can usually get them for less than $5 from Amazon if you don't need or want a drive enclosure for your old drive.
However, the use of your old hard disk in an enclosure and a backup tool like SuperDuper! or CCC gives you both an external drive and the beginning of a solid backup solution as well.
Using a USB Enclosure
If you have a USB enclosure that you can put either the SSD or internal drive in, you can clone your internal to your SSD directly. It's a bit more efficient than pulling from the Time Machine backup. For full instructions, read this, but the short version is:
Using USB Key & Time Machine
If you don't have access to a USB enclosure (although I recommend getting one — they can be had for $30 or less and are very handy to have around), then you can restore from the Time Machine by creating a Recovery Disk on your USB key.