Hi Powzoom,
Unfortunately you do not state which frequency you wish to transmit on. The answer to your question depends on the frequency.
The inductors shown on the link are not suitable as they have low Q (due to their high internal resistance) and the inductor in an oscillator needs to have as high Q as possible.
The construction of a suitable inductor is relatively simple, for instance, if you were to be operating at VHF/UHF the inductor could just be half a dozen turns of stiff wire.
Or if you were operating at lower frequencies, then several tens of turns of insulated wire aroung a ferrite ring would do the job. The precise number of turns depends on the frequency and the size and composition of the core. For more info about that, see the American Radio Relay League handbook, also the websites of manufacturers amidoncorp.com and fair-rite.com. It has to be said though, that neither of these websites is very helpful for beginners.
You mention the current rating. Don't bother about it, as you only wish to transmit a short distance anyway then the power involved is minimal.
One final point. Is what you wish to do legal where you are ? You may find that it is not.
Ned