Spanish help. . ........?

Yes, the word order in noun phrases is different in Spanish.

ENGLISH:
determiner - adjective - noun
a red car

SPANISH:
determiner - noun - adjective
un coche rojo

However, there is no adjective in the sentence you mentioned. Una is a determiner (article) and televisión is a common noun. The reason why we say una instead of uno is because televisión is a feminine noun, not masculine.

Because in spanish everything is masculine or feminine and the tv is feminine so its una. And uno is a number not a adjective lol. You would only use it as one.

The little "dot" is an accent mark (more like a short slash than a dot). Spanish uses only acute accents. There are easy ways to produces accents and other foreign characters. If you expect to use them frequently, try installing the English International keyboard as an alternate to the English (US).

Some of the answers here state basic rules, but beware of exceptions:

Most Spanish nouns ending in -o are masculine, most ending in -a are feminine.
...BUT.....el thema, el problema, el systema, etc (these words were masculine in Greek, and remain masculine in Spanish)
...AND...las manos.

Adjectives generally follow the noun, but in some cases, they may precede the noun, with a difference in meaning: un hombre grande (a big/tall man), un gran hombre (a great man)

Un before a masculine noun, una before a feminine. EXCEPT if the feminine noun begins with the "a" sound (ama, hambre), the correct article is un (because it's easier to pronounce)

A television set= Un televisor.

A television=Una televisión.