I bought a new tallit but I can't read without vowels.

I bought a new tallit but I can't read without vowels.

First of all, welcome.
The top of your tallit has the blessing. With nikkud (the vowelization), it reads:
בָּרוּךְ אַתָּה ה׳ אֱלֹהֵינוּ מֶלֶךְ הָעוֹלָם אֲשֶר קִדְּשָׁנוּ בְּמִצְוֹתָיו, וְצִוָּנוּ לְהִתְעַטֵּף בַּצִּיצִת
Translation:
Blessed are you, Eternal, our G-d, King of the Universe, Who has sanctified us with your Commandments and commanded us to wrap ourselves with tzitzit.
Transliteration (Following American Israeli)
Baruch atah Ado-nai, Eloheinu Melech ha'olam. asher kidǝshanu bǝmitzvotav, vǝtzivanu lǝhit'atef batzitzit.
Notes on transliteration: I have rendered the sheva na with the IPA character ǝ and the ע with an apostrophe.
As mentioned below, most pronounce the ב in בציצית with a sheva, although it is often written with a patach. I have deferred to the written form.