* How can I get a Looney Tunes™ friend?

Looney Tunes™ Friends are additional neighbours so they don't count as your regular neighbours. If your neighbour list is full you don't need to delete your neighbours in order to invite Looney Tunes™ Friends.

You can add the Looney Tunes™ friend by clicking on this special button on your "Add-a-neighbour" tab:

This will take you to the correct link in the bank.

You can also find an option in the Shopping Center:

this will also direct you to the correct link in the bank.

* How many Looney friends can I rent?

As many as you want 

* What does the Rent-a-Looney-friend do?

The Rented Looney-friend will send you a random surprise gift every day.
You'll get a pop-up showing you which gift your Looney friend sent you.

* What sort of gifts does the Looney-friend send?

• Classic I + II for animal stables
• Upgrades for trees
• Crafting products
• Use of Harvester (Machinery)
• Licences (Trade, Gift, Exchange)
• Toolboxes
• Super-grow
• Power-feed
• Suzy Fertiliser
• Pheromones
• Seeds
• CCs
• EPs

* Does this gift count in my maximum-20 allowance?

No.
This gift is extra. You will recieve it even if you've already received 20 gifts that day.

* Can the Looney friend drop off my list due to inactivity?

No.
A Looney friend is always "active" for the whole rented period (14 days).
You'll see it in your neighbour tab like this:

* What happens at the end of the 14 days rental-period?

At your next log-in, your Looney-friend will disappear.

* What happens if I don't log in every day?

You'll still get all the gifts from your rented-friend.

The gifts will be credited to your inventory every 24 hours whether you log in or not.

* Can I send my Looney friend an ingame message? gifts?

No.
Interaction with the Looney-friend is NOT possible.

• You can NOT send gifts/messages.
• It will NOT clear your meadow.

* How much does it cost to rent a Looney-friend?

One rent-a-loony-freind will cost 1,99€ (or equivalent in your currency) and stays 14 days

* Why can't I see the Looney-friend option on my farm?

Unfortunately, some countries do not (yet) have the rights to include Bugs Bunny and Looney Tunes™ features.

* When is this feature available until?

Bugs Bunny can be purchased until June 30th 2012.
The last gifts, not collected if you didn't log-in, will be credited to your account at the latest on December 31st 2012

Source: Official Farmerama Forums.