Noël d'avanct l'heure

You thank someone "par avance" or "d'avance", but for something which is "early something", it's often "en avance"
Here however, the best solution would be "avant l'heure", this is pretty much the usual expression for events that seem to be happening earlier than expected

C'est leétait Noël d'avanct l'heure, il avait des petites lumière qui brillaient dans les rues.

As you alternated past and present tenses, I don't know if you're talking about the present situation or about some past Christmas time (I corrected the latter)

Il y avait des lumières verte, rouge, jaune et bleue.

C'était très belleau, quand j'ai vu les lumières, je me suis souviensu de mon enfance, c'était très joli.

"Ça/ce" always triggers a masculine agreement by default
If you're talking about the lights specifically, you may use "elles" and in this case, the agreement would be feminine

Mes parents m'achèteont toujours lacheté des cadeaux pour le Noël, jusqu'à ce que j'aie 14 ans.

Alternative: "jusqu'à mes 14 ans" (that would be simpler and sound more natural)

Cela me'a décevoir mais j'aiçu qu'ils arrêtent de le faire, mais j'ai (ensuite) compris pourquoi.

What disappointed you isn't that they would buy you presents until 14, but precisely that they stopped doing so, so you have to specify it here