I ought an ikea sewing machine want to know if their is aguarantee with it?

look in the box it came in maybe???

Your user's manual is available as a free download at the Singer Sewing Machine site--select Support at the top. However, I noticed that yours is listed as a Izek 1500. Regardless, it will how you how to insert the needle, as well as many other features. Word to the wise, however--make sure that the replacement needle is all the way up, and the flat part is at the back, away from you. If you don't do those things, all kinds of nasty problems can result. Yours takes a standard sewing machine needle, by the way.

try these sites
ebay
contact these sites and call or email them
sewvacdoctor.com
a1sewingmachines.com

Loads of Threading Diagrams here....
Threading Diagrams for Industrial and Domestic Sewing Machines
one will be like yours...your manual ought to have a diagram too

from IKEA

http://www.ikea.com/fr/fr/safety_data_sheet/sy-machine-a-coudre__SY_machine.pdf

If you need the manual for the Ikea sweing machine, Go to the Ikea website, to the sewing machine, and there is a link "documents" called assembly instructions; that's a pdf of the manual you can download.

Where you bought the machine ought to be able to sell parts.

Ask your local Janome Dealer they ought to be able to access these if not have one in stock.
Janome Global site LINK, select your Country then use the Dealer Locator....or try the local phonebook.

Although your model may not be listed exactly, this link ought to provide other models similar enough to yours to be of assistance.
HERE
Your User Manual ought to have this information too

If you contact you local Brother retailer and explain the problem and give your model number they ought to be able to order a replacement which you can install yourself, or, probably more prudent, ask them if they will do it and also check for any other associated "modifications" made by the little fellow.

USA Dealer Search

or.......There ought to be one similar in your home country