I made some of them for you. I hope there is not too much to correct in my corrections…
· It costs 99 euros and 50 cents. O fiyet 99 euro ve 55 cent.
Fiyatı 99 avro 55 sent. (fiyat + poss 3rd sg ‘its price&rsquo
· I don´t have a cat. Ben kedi var yok
Bir kedim yok. (kedi + poss 1st sg ‘my cat’; var ‘there is’, yok ‘there isn’t)
· Look at the clock! Bak saatta
Saate bak. (word order, as a beginner place the verb to the end; bakmak takes dative, but notice that saat exceptionally breaks vowel harmony)
· I wear shoes. Ben ayak kapı giyiyorum.
Ayakkaplarını giyiyorum. (sg. ayakkabı, pl. ayakkapları because it’s a compound noun actually, accusative ending because it is the object of the action)
· I am making a cake. Ben Börek yapıyorum .
Bir pasta yapıyorum. (börek is more like a pie, I guess; Remember indefinite article)
· I´m reading a book. Ben bir kitap okuyurum
Bir kitap okuyorum. (a small typo only; forget about ben all the time, use it only when in need)
· We are reading newspapers. Biz gazte okuyoruz.
Gazeteler okuyoruz. (plural in the English translation)
· Have you got a car? Sen araba var musun?
Bir araban var mı? (bir undefinite article; araba + poss suff 2nd sg; The possessive construction is made with the possessive ending, not with personal pronoun.)
· I did not close the door. Ben kapı Kaplımadım
Kapıyı kapatmadım. (kapı + buffer + accusative ending, kapat + negation + past tense + personal ending sg 1st)
· I can use this machine. Ben makine kullanabillerim
Bu makineyi kullanabilirim. (makine + buffer + accusative ending; kullan + potential + aorist suffix + personal ending sg 1st)
________
If you ask me you should go back to the basics. Make five sentences a day only but be prompt. Every suffix and letter is there for a reason. Before you continue you should check at least the noun cases, possessive construction and personal endings of verbs.
The good news is your vowels are mostly in their places (Arabic speakers often have trouble in this.)