In some of the reactions,thallium resembles aluminium,whereas in others,it resembles group $1$ metals. Support this statement by giving some evidence.

(N/A) Thallium belongs to group $13$ of the periodic table. The most common oxidation state for this group is $+3$. However,heavier members of this group also display the $+1$ oxidation state due to the inert pair effect.
$1$. Resemblance with aluminium: Thallium exhibits the $+3$ oxidation state in compounds like $TlCl_3$ and $Tl_2O_3$,similar to aluminium ($AlCl_3$ and $Al_2O_3$).
$2$. Resemblance with group $1$ metals: Thallium exhibits the $+1$ oxidation state in compounds like $TlCl$ and $Tl_2O$,which is the characteristic oxidation state of alkali metals (group $1$).