Here is a list of all available minipets

Alen
Available with December 2005 Account Upgrades.

Anjet
Available from Limited Edition Silver Account Upgrades.

Anuriah
Available with December 2005 Account Upgrades.

Bacon
Vault prize June 2007.

Batz
Available from Trick or Treat October 2005.

Billy
Available with new Google Checkout upgrades.

Chibi
Available with May 2007 Account Upgrades.

Chubley
Available from Minipet shop.

Dantiz
Available with Account Upgrade November 2006.

Dasher
Available from Minipet shop

Demi
Available from Minipet shop.

Doogle
Available from Minipet shop.

Dracone
Available from Minipet shop.

Erto
Available with January 2006 Account Upgrades.

Efall
Available with December 2005 Account Upgrades

Fandor
Available from Limited Edition Silver Account Upgrades.

Fatty
Available from Minipet shop

Fawlt
Promote Marapets Prize.

Festival
Prize from Undying Festival July 2007.

Fidge
Available from Minipet shop.

Fild
Available with Account Upgrade in January 2005.

Filondor
War Points redemption prize.

Flobberbat
Available from Minipet shop.

Flayee
Available with September 2005 Account Upgrades.

Fynx
Available from Minipet shop.

Grimmus
Available from Minipet shop.

Grouchy
Available with February 2006 Account Upgrades.

Gutur
Available from Minipet shop

Hammy
Available from Minipet shop.

Jacko
Available from Minipet shop

Jokemo
Available from Minipet shop

Kuork
Available with December 2005 Account Upgrades.

Laiyee
Available with August 2005 Account Upgrades.

Lela
Available with August 2006 Account Upgrades.

Lidge
War Points redemption prize.

Lost
Available with December 2005 Account Upgrades

Loyal
Available from 16 months Loyalty prize.

Lurve
Available with December 2005 Account Upgrades.

Mailo
Available with March 2005 Account Upgrades.

Mugen
Earned from making referrals.

Naoen
Available from Newsletter Giveaway.

Neek
Earned from completing Tarquin Mission 29.

Nodio
Available from Minipet shop.

Olvic
Available with Account Upgrade August 2006.

Pinto
Available with Account Upgrade July 2006.

Pixel
Available with July 2007 Account Upgrades.

Plug
Available with Account Upgrade February 2005.

Poached
Easter 2007 Egg Hunt Prize.

Pongin
War Points redemption prize.

Psyclone
Available with September 2006 Account Upgrades.

Pumkin
Available with Account Upgrade October 2006.

Pumpkin Ed
Available with Special Upgrade November 2006.

Reon
Available with May 2006 Accoun Upgrades

Rweek
Available with March 2006 Account Upgrades.

Schmog
Available with November 2005 Account Upgrades

Scrooge
Available from the Advent Calendar December 2005.

Serri
Only available from the Pirate Ship.

Sk8er
Available with July 2007 Account Upgrades.

Skullington
Available from Minipet shop.

Spooks
Available from Minipet shop.

Tinsel
Available with December 2006 Account Upgrades.

Tweblud
Available with April 2006 Account Upgrades.

Two Million
Available from Two Million player celebrations.

Ush
Available with March 2006 Account Upgrades.

Valentino
Available with Account Upgrade February 2007.

Vampry
Available from Minipet shop.

Vikee
Available from Minipet shop

Volum
Available from Minipet shop.

Witchlet
Available from Minipet shop.

Yonce
Available from Minipet shop

Yoop
Available with March 2006 Account Upgrades.

Zax
Available with July 2005 Account Upgrades.

Zound
Available with March 2006 Account Upgrades.

Here's a list of tools and what they fix:

Axe: This tool will remove overgrown trees.

Hammer: Use this hammer to fix any frames that have fallen down.

Ladder: This tool will help you get the minipets down from the roof of your house.

Pliers: Use this plier to tighten the pipes in your home.

Plunger: This tool will help you clear blocked toilets.

Rake: This tool will help you tidy all of the leaves from around your home.

Saw: Use this saw to cut up any trees that fall on your Marahome.

Screwdriver: Use this screwdriver to tighten screws on your doors.

Shovel: This tool will help you dig up and move bushes.

Sledge Hammer: This tool will help you fix your broken sidewalk.

Spanner: Use this spanner to fix the plumbing of your flooded Marahome.

Tape Measure: This tool will help you measure the size of your room.

Trowel: This tool will help you fix broken walls.