How can I get to tel aviv from abroad?
Your best shot is probably a flight to Ben Gurion airport and a 30 minutes train or bus from the airport to Tel Aviv. Try http://www.israirairlines.com http://www.elal.co.il http://www.arkia.co.il For flights to Israel From Europe you can also get by boat to Haifa sea port, boarding from Greece of Cyprus.
You have not clearly mentioned the place from where you want to come to Tel Aviv. As such, I went to Tel Aviv via flight and it was very convenient. All the arrangements were done by my travel agent; they arranged air tickets and confirmed booking in the well known Boutique hotel in Tel Aviv. Well I will suggest you to go for the flight option only, as it will not consume much time and will be comfortable as well.