It is an Industrial Property right pretty much similar to a patent but its protection lasts shorter (usually 10 years) while its registration is guaranteed, and its cost is much lower (up to 80% lower).
It depends. If your invention is eligible for utility model protection, if 10 years of protection is sufficient, if protection in few European countries (up to 5) is sufficient, if you want/need to have enforceable protection in a short time (less than 1 year), if you want/need to save money (up to 80%), you should prefer the bunch of national utility models.
Filing appropriate text, drawings, application form and (often) a power-of-attorney form at the national patent office of that country in the national language of that country, paying the national filing fees to the national patent office of that country.
Utility models are simply registered as there is no substantive examination. You (often) have only to wait for the registration decision from the national patent office. In some countries there is a registration fee to be paid to the national patent office of that country.
Easy Utility will charge 1,000-2,000 EUR (including official fees) for translating, filing and prosecuting a utility model till its registration in one country. An European patent filed, prosecuted up to its grant (3-5 years later if examination is successfully passed) and validated in France, Germany and Italy costs 10'000-20'000 Euros; while three utility models up to their registration (3-12 months later) through Easy Utility cost less than 6'000 Euros, in average 4'500 Euros.
YES. How to enforce depends on the country. Usually you need a national patent attorney and a national attorney-at-law: Easy Utility has a network of national patent attorneys and attorneys-at-law who can assist you.